ARC: reset: Only build on archs that have IOMEM

This avoids the error:
drivers/reset/reset-hsdk-v1.o: In function `hsdkv1_reset_probe':
/home/thomas/git/linux/drivers/reset/reset-hsdk-v1.c:101: undefined
reference to `devm_ioremap_resource'
collect2: error: ld returned 1 exit status
Signed-off-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

drivers/reset/Kconfig

@@ -36,6 +36,7 @@ config RESET_BERLIN
 
 config RESET_HSDK_V1
 	bool "HSDK v1 Reset Driver"
+	depends on HAS_IOMEM
 	default n
 	help
 	  This enables the reset controller driver for HSDK v1.