spmi: msm: add arbiter version 5 support

Currently driver supports only version 1 and 2.
Version 5 has slightly different registers structure

Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
Cc: Ramon Fried <rfried.dev@gmail.com>
Cc: Tom Rini <trini@konsulko.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 1b3f6c5..9d8cba9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -402,6 +402,7 @@
 F:	drivers/serial/serial_msm.c
 F:	drivers/serial/serial_msm_geni.c
 F:	drivers/smem/msm_smem.c
+F:	drivers/spmi/spmi-msm.c
 F:	drivers/usb/host/ehci-msm.c
 
 ARM STI