soc/intel/pmclib.c: Work around compiler bug -Werror=stringop-overread

On xeon-sp this is a zero length array. With GCC LTO this triggers the
stringop-overread warning. To work around this change the signature of
the function from an array to a pointer.

Change-Id: Ieee6e9bddc4e738eb560dd0e69dc3087ac9f5da6
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84042
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>

src/soc/intel/common/block/pmc/pmclib.c

@@ -94,7 +94,7 @@ static void migrate_power_state(int is_recovery)
 CBMEM_CREATION_HOOK(migrate_power_state);
 
 static void print_num_status_bits(int num_bits, uint32_t status,
-				  const char *const bit_names[])
+				  const char *const *bit_names)
 {
 	int i;