llext: use EXPORT_SYMBOL() universally

Replace LL_EXTENSION_SYMBOL() with EXPORT_SYMBOL() in all tests and
samples.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>

samples/subsys/llext/edk/ext1/src/main.c

@@ -31,4 +31,4 @@ int start(void)
 
 	return 0;
 }
-LL_EXTENSION_SYMBOL(start);
+EXPORT_SYMBOL(start);

samples/subsys/llext/edk/ext2/src/main.c

@@ -23,4 +23,4 @@ int start(void)
 
 	return 0;
 }
-LL_EXTENSION_SYMBOL(start);
+EXPORT_SYMBOL(start);

samples/subsys/llext/edk/ext3/src/main.c

@@ -62,4 +62,4 @@ int start(void)
 
 	return 0;
 }
-LL_EXTENSION_SYMBOL(start);
+EXPORT_SYMBOL(start);

samples/subsys/llext/edk/k-ext1/src/main.c

@@ -61,4 +61,4 @@ int start(void)
 
 	return 0;
 }
-LL_EXTENSION_SYMBOL(start);
+EXPORT_SYMBOL(start);

samples/subsys/llext/modules/src/hello_world_ext.c

@@ -24,4 +24,4 @@ void hello_world(void)
 	printk("Hello, world, from an llext!\n");
 #endif
 }
-LL_EXTENSION_SYMBOL(hello_world);
+EXPORT_SYMBOL(hello_world);

tests/misc/llext-edk/extension/src/main.c

@@ -14,4 +14,4 @@ int start(int bar)
 	printk("foo(%d) is %d\n", bar, foo(bar));
 	return 0;
 }
-LL_EXTENSION_SYMBOL(start);
+EXPORT_SYMBOL(start);

tests/subsys/llext/simple/src/find_section_ext.c

@@ -22,4 +22,4 @@ void test_entry(void)
 	/* unused */
 }
 
-LL_EXTENSION_SYMBOL(number);
+EXPORT_SYMBOL(number);

tests/subsys/llext/simple/src/hello_world_ext.c

@@ -24,4 +24,4 @@ void test_entry(void)
 	printk("A number is %u\n", number);
 	zassert_equal(number, 42);
 }
-LL_EXTENSION_SYMBOL(test_entry);
+EXPORT_SYMBOL(test_entry);

tests/subsys/llext/simple/src/logging_ext.c

@@ -23,4 +23,4 @@ void test_entry(void)
 	LOG_INF("hello world");
 	LOG_INF("A number is %" PRIu32, number);
 }
-LL_EXTENSION_SYMBOL(test_entry);
+EXPORT_SYMBOL(test_entry);

tests/subsys/llext/simple/src/movwmovt_ext.c

@@ -32,4 +32,4 @@ void test_entry(void)
 	__asm volatile ("blx r0");
 	zassert_equal(test_var, 1, "mov.w and mov.t test failed");
 }
-LL_EXTENSION_SYMBOL(test_entry);
+EXPORT_SYMBOL(test_entry);

tests/subsys/llext/simple/src/multi_file_ext1.c

@@ -50,4 +50,4 @@ void test_entry(void)
 
 	run_id += 1;
 }
-LL_EXTENSION_SYMBOL(test_entry);
+EXPORT_SYMBOL(test_entry);

tests/subsys/llext/simple/src/object_ext.c

@@ -45,4 +45,4 @@ void test_entry(void)
 
 	run_id += 1;
 }
-LL_EXTENSION_SYMBOL(test_entry);
+EXPORT_SYMBOL(test_entry);

tests/subsys/llext/simple/src/pre_located_ext.c

@@ -16,4 +16,4 @@ void test_entry(void)
 {
 	/* This function is never called */
 }
-LL_EXTENSION_SYMBOL(test_entry);
+EXPORT_SYMBOL(test_entry);

tests/subsys/llext/simple/src/relative_jump_ext.c

@@ -62,4 +62,4 @@ void test_entry(void)
 	printk("exit\n");
 	zassert_equal(test_var, 1, "relative jump test failed");
 }
-LL_EXTENSION_SYMBOL(test_entry);
+EXPORT_SYMBOL(test_entry);

tests/subsys/llext/simple/src/syscalls_ext.c

@@ -23,4 +23,4 @@ void test_entry(void)
 	       input, input + 1, output);
 	zassert_equal(output, input + 1);
 }
-LL_EXTENSION_SYMBOL(test_entry);
+EXPORT_SYMBOL(test_entry);

tests/subsys/llext/simple/src/threads_kernel_objects_ext.c

@@ -42,4 +42,4 @@ void test_entry(void)
 	k_thread_join(&my_thread, K_FOREVER);
 	printk("Test thread joined\n");
 }
-LL_EXTENSION_SYMBOL(test_entry);
+EXPORT_SYMBOL(test_entry);