src: Remove unused '#include <cpu/cpu.h>'

Change-Id: Ibcb1cafe36c255b4c5bd0a4faeedb95e91048709
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36372
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/soc/intel/broadwell/lpc.c

@@ -26,7 +26,6 @@
 #include <device/pci_ops.h>
 #include <arch/ioapic.h>
 #include <arch/acpi.h>
-#include <cpu/cpu.h>
 #include <cpu/x86/smm.h>
 #include <cbmem.h>
 #include <reg_script.h>