arch: remove redundant UAPI generic-y defines

Now that Kbuild automatically creates asm-generic wrappers for missing
mandatory headers, it is redundant to list the same headers in
generic-y and mandatory-y.

Suggested-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>

arch/powerpc/include/uapi/asm/Kbuild

@@ -2,9 +2,3 @@ include include/uapi/asm-generic/Kbuild.asm
 
 generated-y += unistd_32.h
 generated-y += unistd_64.h
-generic-y += param.h
-generic-y += poll.h
-generic-y += resource.h
-generic-y += sockios.h
-generic-y += statfs.h
-generic-y += siginfo.h