arm: samsung: Migrate a number of symbols to Kconfig

- In a number of cases, use CONFIG_ARCH_EXYNOS[45] rather than
  CONFIG_EXYNOS[45]
- In other cases, test for CONFIG_ARCH_EXYNOS or CONFIG_ARCH_S5PC1XX
- Migrate specific SoC CONFIG values to Kconfig
- Use CONFIG_TARGET_x rather than CONFIG_x
- Migrate other CONFIG_EXYNOS_x symbols to Kconfig
- Reference CONFIG_EXYNOS_RELOCATE_CODE_BASE directly as EXYNOS_RELOCATE_CODE_BASE
- Rename CONFIG_S5P_PA_SYSRAM to CONFIG_SMP_PEN_ADDR to match the rest
  of U-Boot usage.

Cc: Minkyu Kang <mk7.kang@samsung.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/odroid-xu3_defconfig b/configs/odroid-xu3_defconfig
index 7acdca9..929a521 100644
--- a/configs/odroid-xu3_defconfig
+++ b/configs/odroid-xu3_defconfig
@@ -6,6 +6,7 @@
 CONFIG_SYS_MALLOC_LEN=0x5004000
 CONFIG_SYS_MALLOC_F_LEN=0x400
 CONFIG_ARCH_EXYNOS5=y
+# CONFIG_EXYNOS_TMU is not set
 CONFIG_NR_DRAM_BANKS=8
 CONFIG_ENV_SIZE=0x4000
 CONFIG_ENV_OFFSET=0x310000