ARM: SAMSUNG: Compile legacy IRQ and GPIO PM code only with ATAGS support

This patch adds new Kconfig symbols, SAMSUNG_PM_GPIO and S5P_IRQ_PM that
get enabled when GPIO_SAMSUNG, PM and S5P_PM are enabled, but only if
SAMSUNG_ATAGS is selected.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/arch/arm/plat-samsung/Kconfig b/arch/arm/plat-samsung/Kconfig
index c0f0542..7b08b26 100644
--- a/arch/arm/plat-samsung/Kconfig
+++ b/arch/arm/plat-samsung/Kconfig
@@ -421,6 +421,19 @@
 	help
 	  Internal configuration for S3C DMA core
 
+config S5P_IRQ_PM
+	bool
+	default y if S5P_PM
+	help
+	  Legacy IRQ power management for S5P platforms
+
+config SAMSUNG_PM_GPIO
+	bool
+	default y if GPIO_SAMSUNG && PM
+	help
+	  Include legacy GPIO power management code for platforms not using
+	  pinctrl-samsung driver.
+
 endif
 
 config SAMSUNG_DMADEV