gcov: add support for GCC 14

Using gcov on kernels compiled with GCC 14 results in truncated 16-byte
long .gcda files with no usable data.  To fix this, update GCOV_COUNTERS
to match the value defined by GCC 14.

Tested with GCC versions 14.1.0 and 13.2.0.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Peter Oberparleiter <[email protected]>
Reported-by: Allison Henderson <[email protected]>
Reported-by: Chuck Lever III <[email protected]>
Tested-by: Chuck Lever <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: oberpar

kernel/gcov/gcc_4_7.c

@@ -18,7 +18,9 @@
 #include <linux/mm.h>
 #include "gcov.h"
 
-#if (__GNUC__ >= 10)
+#if (__GNUC__ >= 14)
+#define GCOV_COUNTERS			9
+#elif (__GNUC__ >= 10)
 #define GCOV_COUNTERS			8
 #elif (__GNUC__ >= 7)
 #define GCOV_COUNTERS			9