[PATCH] clk: lan966x: Depend on CONFIG_IOMEM

[David Gow <davidgow@google.com>]

The lan966x clk driver depends on IOMEM functions, in particular
devm_platform_ioremap_resource(), but doesn't state a formal dependency
on it in Kconfig.

Add such a dependency, which prevents this driver from being enabled
on UML configurations without IOMEM.

This fixes the following build failure:

/usr/bin/ld: drivers/clk/clk-lan966x.o: in function `lan966x_clk_probe':
clk-lan966x.c:(.text+0x294): undefined reference to `devm_platform_ioremap_resource'
/usr/bin/ld: clk-lan966x.c:(.text+0x3aa): undefined reference to `devm_ioremap_resource'
collect2: error: ld returned 1 exit status

Signed-off-by: David Gow <davidgow@google.com>
---
 drivers/clk/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 3cdf33470a75..7b5db8a9eb4f 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -231,6 +231,7 @@ config COMMON_CLK_GEMINI
 
 config COMMON_CLK_LAN966X
 	bool "Generic Clock Controller driver for LAN966X SoC"
+	depends on IOMEM
 	help
 	  This driver provides support for Generic Clock Controller(GCK) on
 	  LAN966X SoC. GCK generates and supplies clock to various peripherals
-- 
2.35.1.473.g83b2b277ed-goog