samples: pref: Use __noinline attribute

Use Zephyr definition for noinline attribute.

Signed-off-by: Flavio Ceolin <[email protected]>

Author: ceolin

samples/subsys/profiling/perf/src/main.c

@@ -5,39 +5,38 @@
  */
 
 #include <zephyr/kernel.h>
+#include <zephyr/toolchain.h>
 #include <stdio.h>
 
 #define WAIT_KOEF 10000
 
-#define NOINLINE __attribute__((noinline))
-
-int NOINLINE func_0_0(void)
+int __noinline func_0_0(void)
 {
 	k_busy_wait(1*WAIT_KOEF);
 	return 0;
 }
 
-int NOINLINE func_0_1(void)
+int __noinline func_0_1(void)
 {
 	k_busy_wait(2*WAIT_KOEF);
 	return 0;
 }
 
-int NOINLINE func_0(void)
+int __noinline func_0(void)
 {
 	k_busy_wait(1*WAIT_KOEF);
 	func_0_0();
 	func_0_1();
 	return 0;
 }
 
-int NOINLINE func_1(void)
+int __noinline func_1(void)
 {
 	k_busy_wait(3*WAIT_KOEF);
 	return 0;
 }
 
-int NOINLINE func_2(void)
+int __noinline func_2(void)
 {
 	k_busy_wait(4*WAIT_KOEF);
 	return 0;