MAINTAINERS: use correct filename for sdhci-bcm-kona

Use dashes not underscores.

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Christian Daudt <csd@broadcom.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 file changed