soc/intel/fsp_baytrail: Remove unused 'barrier()'

Change-Id: I4330fd9b2ec6ca36beae3213642f7a4ae61f7dbe
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36488
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/soc/intel/fsp_baytrail/include/soc/baytrail.h

@@ -47,8 +47,6 @@
 #ifndef __ASSEMBLER__
 #include <device/device.h>
 
-static inline void barrier(void) { asm("" ::: "memory"); }
-
 int bridge_silicon_revision(void);
 void rangeley_early_initialization(void);
 void set_max_freq(void);