of: clean up OF_CONTROL ifdef conditionals

We have flipped CONFIG_SPL_DISABLE_OF_CONTROL.  We have cleansing
devices, $(SPL_) and CONFIG_IS_ENABLED(), so we are ready to clear
away the ugly logic in include/fdtdec.h:

 #ifdef CONFIG_OF_CONTROL
 # if defined(CONFIG_SPL_BUILD) && !defined(SPL_OF_CONTROL)
 #  define OF_CONTROL 0
 # else
 #  define OF_CONTROL 1
 # endif
 #else
 # define OF_CONTROL 0
 #endif

Now CONFIG_IS_ENABLED(OF_CONTROL) is the substitute.  It refers to
CONFIG_OF_CONTROL for U-boot proper and CONFIG_SPL_OF_CONTROL for
SPL.

Also, we no longer have to cancel CONFIG_OF_CONTROL in
include/config_uncmd_spl.h and scripts/Makefile.spl.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/arch/arm/mach-exynos/include/mach/dwmmc.h b/arch/arm/mach-exynos/include/mach/dwmmc.h
index a7ca12c..bd997ad 100644
--- a/arch/arm/mach-exynos/include/mach/dwmmc.h
+++ b/arch/arm/mach-exynos/include/mach/dwmmc.h
@@ -27,7 +27,5 @@
 #define DWMCI_DIVRATIO_BIT		24
 #define DWMCI_DIVRATIO_MASK		0x7
 
-#ifdef CONFIG_OF_CONTROL
 int exynos_dwmmc_init(const void *blob);
-#endif
 int exynos_dwmci_add_port(int index, u32 regbase, int bus_width, u32 clksel);
diff --git a/arch/arm/mach-exynos/include/mach/mipi_dsim.h b/arch/arm/mach-exynos/include/mach/mipi_dsim.h
index 50e5c25..c9e8e06 100644
--- a/arch/arm/mach-exynos/include/mach/mipi_dsim.h
+++ b/arch/arm/mach-exynos/include/mach/mipi_dsim.h
@@ -374,7 +374,5 @@
 /* panel driver init based on mipi dsi interface */
 void s6e8ax0_init(void);
 
-#ifdef CONFIG_OF_CONTROL
 extern int mipi_power(void);
-#endif
 #endif /* _DSIM_H */
diff --git a/arch/arm/mach-exynos/include/mach/mmc.h b/arch/arm/mach-exynos/include/mach/mmc.h
index 0fb6461..48b8c4d 100644
--- a/arch/arm/mach-exynos/include/mach/mmc.h
+++ b/arch/arm/mach-exynos/include/mach/mmc.h
@@ -65,8 +65,6 @@
 	return s5p_sdhci_init(base, index, bus_width);
 }
 
-#ifdef CONFIG_OF_CONTROL
 int exynos_mmc_init(const void *blob);
-#endif
 
 #endif
diff --git a/arch/arm/mach-exynos/pinmux.c b/arch/arm/mach-exynos/pinmux.c
index e97cb37..179b294 100644
--- a/arch/arm/mach-exynos/pinmux.c
+++ b/arch/arm/mach-exynos/pinmux.c
@@ -874,7 +874,7 @@
 	return -1;
 }
 
-#ifdef CONFIG_OF_CONTROL
+#if CONFIG_IS_ENABLED(OF_CONTROL)
 static int exynos4_pinmux_decode_periph_id(const void *blob, int node)
 {
 	int err;