microblaze: Fix bug with mmap2 syscall MB implementation

Fix mmap2 behaviour which incorrectly works with pgoff
not in 4k units.

Reported-by: Rich Felker <dalias@aerifal.cx>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
diff --git a/arch/microblaze/kernel/syscall_table.S b/arch/microblaze/kernel/syscall_table.S
index 4fca56c..b882ad5 100644
--- a/arch/microblaze/kernel/syscall_table.S
+++ b/arch/microblaze/kernel/syscall_table.S
@@ -192,7 +192,7 @@
 	.long sys_ni_syscall		/* reserved for streams2 */
 	.long sys_vfork		/* 190 */
 	.long sys_getrlimit
-	.long sys_mmap_pgoff		/* mmap2 */
+	.long sys_mmap2
 	.long sys_truncate64
 	.long sys_ftruncate64
 	.long sys_stat64		/* 195 */