[PATCH -next] staging: fieldbus: Fix build error without CONFIG_REGMAP_MMIO

[YueHaibing]

Fix gcc build error while CONFIG_REGMAP_MMIO is not set

drivers/staging/fieldbus/anybuss/arcx-anybus.o: In function `controller_probe':
arcx-anybus.c:(.text+0x9d6): undefined reference to `__devm_regmap_init_mmio_clk'

Select REGMAP_MMIO to fix it.

Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Fixes: 2411a336c8ce ("staging: fieldbus: arcx-anybus: change custom -> mmio regmap")
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 drivers/staging/fieldbus/anybuss/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/staging/fieldbus/anybuss/Kconfig b/drivers/staging/fieldbus/anybuss/Kconfig
index 8bc3d9a..635a0a7 100644
--- a/drivers/staging/fieldbus/anybuss/Kconfig
+++ b/drivers/staging/fieldbus/anybuss/Kconfig
@@ -14,6 +14,7 @@ if HMS_ANYBUSS_BUS
 config ARCX_ANYBUS_CONTROLLER
 	tristate "Arcx Anybus-S Controller"
 	depends on OF && GPIOLIB && HAS_IOMEM && REGULATOR
+	select REGMAP_MMIO
 	help
 	  Select this to get support for the Arcx Anybus controller.
 	  It connects to the SoC via a parallel memory bus, and
-- 
2.7.4