linux-wandboard

ENGR00223111 mmc: sdhci:fix sdio suspend/resume timeout issue

Enable sdio wifi, do suspend/resume, resume will be blocked by
"mmc2: Timeout waiting for hardware interrupt." But no this issue
for emmc/sd. The root cause is: for emmc&sd device, the upper layer
don't pass any transfer requests to host in suspend for all requests
are issued by host. But for wifi sdio,it is not always issued by
host. When data/cmd packets arrive, it can interrupt CPU. so in resume
, request_irq should be done after sdhci_init, Or some hardware interrupts
will be cleared by sdhci_init.

Signed-off-by: Jianzheng Zhou <jianzheng.zhou@freescale.com>