[PATCH -next] powerpc/mpic_msgr: fix cast removes address space of expression warnings

[ruanjinjie]

When build Linux kernel, encounter the following warnings:

./arch/powerpc/sysdev/mpic_msgr.c:230:38: warning: cast removes address space '__iomem' of expression
./arch/powerpc/sysdev/mpic_msgr.c:230:27: warning: incorrect type in assignment (different address spaces)

The data type of msgr->mer and msgr->base are 'u32 __iomem *', but
converted to 'u32 *' and 'u8 *' directly and cause above warnings, now
recover their data types to fix these warnings.

Signed-off-by: ruanjinjie <ruanjinjie@xxxxxxxxxx>
---
 arch/powerpc/sysdev/mpic_msgr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/sysdev/mpic_msgr.c b/arch/powerpc/sysdev/mpic_msgr.c
index 698fefaaa6dd..cbb0d24f15ba 100644
--- a/arch/powerpc/sysdev/mpic_msgr.c
+++ b/arch/powerpc/sysdev/mpic_msgr.c
@@ -227,7 +227,7 @@ static int mpic_msgr_probe(struct platform_device *dev)
 
 		reg_number = block_number * MPIC_MSGR_REGISTERS_PER_BLOCK + i;
 		msgr->base = msgr_block_addr + i * MPIC_MSGR_STRIDE;
-		msgr->mer = (u32 *)((u8 *)msgr->base + MPIC_MSGR_MER_OFFSET);
+		msgr->mer = (u32 __iomem *)((u8 __iomem *)msgr->base + MPIC_MSGR_MER_OFFSET);
 		msgr->in_use = MSGR_FREE;
 		msgr->num = i;
 		raw_spin_lock_init(&msgr->lock);
-- 
2.25.1