mmc: mxcmmc: Fix missing parentheses and brace

Looks like the adjusted syntax wasn't fully build tested. This fixes
failures with powerpc builds:

drivers/mmc/host/mxcmmc.c: In function ‘mxcmci_swap_buffers’:
drivers/mmc/host/mxcmmc.c:296:51: error: expected ‘)’ before ‘;’ token
   void *buf = kmap_atomic(sg_page(sg) + sg->offset;
                                                   ^
drivers/mmc/host/mxcmmc.c:299:1: error: expected ‘,’ or ‘;’ before ‘}’ token
 }
 ^

Fixes: b189e75 ("mmc: mxcmmc: handle highmem pages")
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/mxcmmc.c

@@ -293,9 +293,10 @@ static void mxcmci_swap_buffers(struct mmc_data *data)
 	int i;
 
 	for_each_sg(data->sg, sg, data->sg_len, i) {
-		void *buf = kmap_atomic(sg_page(sg) + sg->offset;
+		void *buf = kmap_atomic(sg_page(sg) + sg->offset);
 		buffer_swap32(buf, sg->length);
 		kunmap_atomic(buf);
+	}
 }
 #else
 static inline void mxcmci_swap_buffers(struct mmc_data *data) {}