powerpc: Use the asm-generic versions of some uapi includes

These are completely obvious as all they do is include the asm-generic
versions.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/uapi/asm/Kbuild

 # UAPI Header export list
 include include/uapi/asm-generic/Kbuild.asm
+
+generic-y += param.h
+generic-y += poll.h
+generic-y += resource.h
+generic-y += statfs.h

arch/powerpc/include/uapi/asm/param.h

-#include <asm-generic/param.h>

arch/powerpc/include/uapi/asm/poll.h

-#include <asm-generic/poll.h>

arch/powerpc/include/uapi/asm/resource.h

-#include <asm-generic/resource.h>

arch/powerpc/include/uapi/asm/statfs.h

-#ifndef _ASM_POWERPC_STATFS_H
-#define _ASM_POWERPC_STATFS_H
-
-#include <asm-generic/statfs.h>
-
-#endif