sh: allow alignment fault mode to be configured at kernel boot.

Follow the ARM change, which is what our alignment helpers are based on
in the first place.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/mm/alignment.c

@@ -27,6 +27,8 @@ static int se_usermode = UM_WARN | UM_FIXUP;
 /* 0: no warning 1: print a warning message, disabled by default */
 static int se_kernmode_warn;
 
+core_param(alignment, se_usermode, int, 0600);
+
 void inc_unaligned_byte_access(void)
 {
 	se_half++;