sparc: Remove reg*.h from Kbuild

Forgot to commit this in previous change, noticed by
Sam.

Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/include/asm/Kbuild

@@ -13,9 +13,6 @@ header-y += perfctr.h
 header-y += psrcompat.h
 header-y += psr.h
 header-y += pstate.h
-header-y += reg.h
-header-y += reg_32.h
-header-y += reg_64.h
 header-y += traps.h
 header-y += uctx.h
 header-y += utrap.h