MAINTAINERS: use correct filename for sdhci-bcm-kona

Use dashes not underscores.

Signed-off-by: Joe Perches <[email protected]>
Cc: Christian Daudt <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
1 file changed