powerpc/uaccess: Define ___get_user_instr() for ppc32

Define simple ___get_user_instr() for ppc32 instead of
defining ppc32 versions of the three get_user_instr()
helpers.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/e02f83ec74f26d76df2874f0ce4d5cc69c3469ae.1615398265.git.christophe.leroy@csgroup.eu

arch/powerpc/include/asm/uaccess.h

@@ -81,6 +81,10 @@ static inline bool __access_ok(unsigned long addr, unsigned long size)
 	}								\
 	__gui_ret;							\
 })
+#else /* !CONFIG_PPC64 */
+#define ___get_user_instr(gu_op, dest, ptr)				\
+	gu_op((dest).val, (u32 __user *)(ptr))
+#endif /* CONFIG_PPC64 */
 
 #define get_user_instr(x, ptr) \
 	___get_user_instr(get_user, x, ptr)
@@ -91,18 +95,6 @@ static inline bool __access_ok(unsigned long addr, unsigned long size)
 #define __get_user_instr_inatomic(x, ptr) \
 	___get_user_instr(__get_user_inatomic, x, ptr)
 
-#else /* !CONFIG_PPC64 */
-#define get_user_instr(x, ptr) \
-	get_user((x).val, (u32 __user *)(ptr))
-
-#define __get_user_instr(x, ptr) \
-	__get_user_nocheck((x).val, (u32 __user *)(ptr), sizeof(u32), true)
-
-#define __get_user_instr_inatomic(x, ptr) \
-	__get_user_nosleep((x).val, (u32 __user *)(ptr), sizeof(u32))
-
-#endif /* CONFIG_PPC64 */
-
 extern long __put_user_bad(void);
 
 #define __put_user_size(x, ptr, size, retval)			\