mmc: sdhci-bcm-kona: Staticize sdhci_bcm_kona_card_event
mmc: sdhci-bcm-kona: Staticize sdhci_bcm_kona_card_event

sdhci_bcm_kona_card_event is referenced only in this file.
Make it static.

Signed-off-by: Sachin Kamat <1c3b1584a6008857f36c03c58f657c0fc16fc09e@linaro.org>
Acked-by: Christian Daudt <9f4921b51c2e573cead9af22c0e0d1a14ad7b643@broadcom.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs