Makefile: make UP2 sample directory name consistent with board name

It makes more sense by aligning directory name with board name.

Tracked-On: #2760
Signed-off-by: Tw <wei.tan@intel.com>
Reviewed-by: Binbin Wu <binbin.wu@intel.com>

devicemodel/Makefile

@@ -163,7 +163,7 @@ PROGRAM := acrn-dm
 
 SAMPLES_NUC := $(wildcard samples/nuc/*)
 SAMPLES_MRB := $(wildcard samples/apl-mrb/*)
-SAMPLES_UP2 := $(wildcard samples/up2/*)
+SAMPLES_UP2 := $(wildcard samples/apl-up2/*)
 
 BIOS_BIN := $(wildcard bios/*)
 
@@ -219,7 +219,7 @@ install: $(DM_OBJDIR)/$(PROGRAM) install-samples-nuc install-samples-mrb install
 	install -D --mode=0755 $(DM_OBJDIR)/$(PROGRAM) $(DESTDIR)/usr/bin/$(PROGRAM)
 
 install-samples-up2: $(SAMPLES_UP2)
-	install -D -t $(DESTDIR)/usr/share/acrn/samples/up2 $^
+	install -D -t $(DESTDIR)/usr/share/acrn/samples/apl-up2 $^
 
 install-samples-nuc: $(SAMPLES_NUC)
 	install -D -t $(DESTDIR)/usr/share/acrn/samples/nuc $^