binfmt_flat: fix arch/m32r and arch/microblaze flat_put_addr_at_rp()

Change the m32r flat_put_addr_at_rp() function to return int and
always return 0.

The microblaze function already returned 0 so just change its
function return type from void to int.

Seven (7) other arch-es already have this function as returning
an int type result.

Fixes: 468138d (binfmt_flat: flat_{get,put}_addr_from_rp()
	should be able to fail)

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/m32r/include/asm/flat.h

@@ -95,7 +95,7 @@ static inline unsigned long m32r_flat_get_addr_from_rp (u32 *rp,
 	return ~0;      /* bogus value */
 }
 
-static inline void flat_put_addr_at_rp(u32 *rp, u32 addr, u32 relval)
+static inline int flat_put_addr_at_rp(u32 *rp, u32 addr, u32 relval)
 {
         unsigned int reloc = flat_m32r_get_reloc_type (relval);
 	if (reloc & 0xf0) {
@@ -133,6 +133,7 @@ static inline void flat_put_addr_at_rp(u32 *rp, u32 addr, u32 relval)
 			break;
 		}
 	}
+	return 0;
 }
 
 // kludge - text_len is a local variable in the only user.

arch/microblaze/include/asm/flat.h

@@ -60,7 +60,7 @@ static inline int flat_get_addr_from_rp(u32 __user *rp, u32 relval, u32 flags,
  * unaligned.
  */
 
-static inline void
+static inline int
 flat_put_addr_at_rp(u32 __user *rp, u32 addr, u32 relval)
 {
 	u32 *p = (__force u32 *)rp;