c6x: use generic kvm_para.h

Signed-off-by: Mark Salter <msalter@redhat.com>

arch/c6x/include/uapi/asm/Kbuild

 # UAPI Header export list
 include include/uapi/asm-generic/Kbuild.asm
 
+generic-y += kvm_para.h
+
 header-y += byteorder.h
 header-y += kvm_para.h
 header-y += ptrace.h

arch/c6x/include/uapi/asm/kvm_para.h

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