mmc: bcm2835: Replace kmap_atomic() with kmap_local_page()

kmap_local_page() is equivalent to kmap_atomic() except that it does not
disable page faults or preemption. Where possible kmap_local_page() is
preferred to kmap_atomic() - refer kernel highmem documentation.

In this case, there is no need to disable page faults or preemption, so
replace kmap_atomic() with kmap_local_page(), and, correspondingly,
kunmap_atomic() with kunmap_local().
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20221005101951.3165-7-adrian.hunter@intel.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/bcm2835.c

@@ -1070,7 +1070,7 @@ static void bcm2835_dma_complete_work(struct work_struct *work)
 			host->drain_page += host->drain_offset >> PAGE_SHIFT;
 			host->drain_offset &= ~PAGE_MASK;
 		}
-		page = kmap_atomic(host->drain_page);
+		page = kmap_local_page(host->drain_page);
 		buf = page + host->drain_offset;
 
 		while (host->drain_words) {
@@ -1081,7 +1081,7 @@ static void bcm2835_dma_complete_work(struct work_struct *work)
 			host->drain_words--;
 		}
 
-		kunmap_atomic(page);
+		kunmap_local(page);
 	}
 
 	bcm2835_finish_data(host);