sparc32: Remove asm/sysen.h header.

Defines a sun4c register, thus completely unused.
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/include/asm/sysen.h

-/*
- * sysen.h:  Bit fields within the "System Enable" register accessed via
- *           the ASI_CONTROL address space at address AC_SYSENABLE.
- *
- * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu)
- */
-
-#ifndef _SPARC_SYSEN_H
-#define _SPARC_SYSEN_H
-
-#define SENABLE_DVMA   0x20   /* enable dvma transfers */
-#define SENABLE_CACHE  0x10   /* enable VAC cache */
-#define SENABLE_RESET  0x04   /* reset whole machine, danger Will Robinson */
-
-#endif /* _SPARC_SYSEN_H */