wilc1000: use fixed function base register value to access SDIO_FBR_ENABLE_CSA

The function number was not correct(reset to 0) when host resumes from
suspend state. Use hardcoded value in function base information
register(FBR base address) to re-initialize correctly on host resume.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220504161924.2146601-2-ajay.kathat@microchip.com