mmc: wbsd: Remove stray kunmap_atomic()

There was one kunmap_atomic() left over from
4a0ddbd25ad4e03a0a1657f5cb2259c9a35fe9e6 that was causing
crashes.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
diff --git a/drivers/mmc/wbsd.c b/drivers/mmc/wbsd.c
index 2d323af..05ccfc4 100644
--- a/drivers/mmc/wbsd.c
+++ b/drivers/mmc/wbsd.c
@@ -343,7 +343,6 @@
 			memcpy(sgbuf, dmabuf, size);
 		else
 			memcpy(sgbuf, dmabuf, sg[i].length);
-		kunmap_atomic(sgbuf, KM_BIO_SRC_IRQ);
 		dmabuf += sg[i].length;
 
 		if (size < sg[i].length)