DMIC: Move ceil_divide from numbers.c to numbers.h as static inline

The DMIC driver needs this function. This inline version is a
bit faster and the change does not increase code size.

Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>

src/include/sof/math/numbers.h

@@ -40,8 +40,19 @@
 
 int gcd(int a, int b); /* Calculate greatest common divisor for a and b */
 
-/* Divide function that returns ceil() of quotient */
-int ceil_divide(int a, int b);
+/* This is a divide function that returns ceil of the quotient.
+ * E.g. ceil_divide(9, 3) returns 3, ceil_divide(10, 3) returns 4.
+ */
+static inline int ceil_divide(int a, int b)
+{
+	int c;
+
+	c = a / b;
+	if (c * b < a)
+		c++;
+
+	return c;
+}
 
 /* Find indices of equal values in a vector of integer values */
 int find_equal_int16(int16_t idx[], int16_t vec[], int n, int vec_length,

src/math/numbers.c

@@ -49,20 +49,6 @@ int gcd(int a, int b)
 	return a;
 }
 
-/* This is a divide function that returns ceil of the quotient.
- * E.g. ceil_divide(9, 3) returns 3, ceil_divide(10, 3) returns 4.
- */
-int ceil_divide(int a, int b)
-{
-	int c;
-
-	c = a / b;
-	if (c * b < a)
-		c++;
-
-	return c;
-}
-
 /* This function searches from vec[] (of length vec_length) integer values
  * of n. The indexes to equal values is returned in idx[]. The function
  * returns the number of found matches. The max_results should be set to