mmc: sh_mmcif: sg_miter must not be atomic

All the sglist iterations happen in the *threaded* interrupt handler and
that context is not atomic, so don't request an atomic sglist miter. Using
an atomic miter results in "BUG: scheduling while atomic" splats.

Reported-by: Geert Uytterhoeven <[e-mail]>
Fixes: 27b57277d9ba ("mmc: sh_mmcif: Use sg_miter for PIO")
Tested-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/mmc/host/sh_mmcif.c

···
 			   BLOCK_SIZE_MASK) + 3;
 
 	sg_miter_start(&host->sg_miter, data->sg, data->sg_len,
-		       SG_MITER_ATOMIC | SG_MITER_TO_SG);
+		       SG_MITER_TO_SG);
 
 	host->wait_for = MMCIF_WAIT_FOR_READ;
 
···
 		BLOCK_SIZE_MASK;
 
 	sg_miter_start(&host->sg_miter, data->sg, data->sg_len,
-		       SG_MITER_ATOMIC | SG_MITER_TO_SG);
+		       SG_MITER_TO_SG);
 
 	host->wait_for = MMCIF_WAIT_FOR_MREAD;
 
···
 			   BLOCK_SIZE_MASK) + 3;
 
 	sg_miter_start(&host->sg_miter, data->sg, data->sg_len,
-		       SG_MITER_ATOMIC | SG_MITER_FROM_SG);
+		       SG_MITER_FROM_SG);
 
 	host->wait_for = MMCIF_WAIT_FOR_WRITE;
 
···
 		BLOCK_SIZE_MASK;
 
 	sg_miter_start(&host->sg_miter, data->sg, data->sg_len,
-		       SG_MITER_ATOMIC | SG_MITER_FROM_SG);
+		       SG_MITER_FROM_SG);
 
 	host->wait_for = MMCIF_WAIT_FOR_MWRITE;