src: Remove unused include <string.h>

Change-Id: Ic6b66dd8fa387e67bb0ce609fb7e2553eeb66b3c
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37888
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/intel/baytrail/acpi.c

@@ -22,7 +22,6 @@
 #include <console/console.h>
 #include <cpu/x86/smm.h>
 #include <types.h>
-#include <string.h>
 #include <cpu/x86/msr.h>
 #include <cpu/x86/tsc.h>
 #include <cpu/intel/turbo.h>