ARM: 8403/1: kbuild: don't use generic mcs_spinlock.h header

We provide our own implementation of asm/mcs_spinlock.h, so there's no
need to ask for the (empty) generic version.
Signed-off-by: NWill Deacon <will.deacon@arm.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/include/asm/Kbuild

@@ -12,7 +12,6 @@ generic-y += irq_regs.h
 generic-y += kdebug.h
 generic-y += local.h
 generic-y += local64.h
-generic-y += mcs_spinlock.h
 generic-y += msgbuf.h
 generic-y += param.h
 generic-y += parport.h