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/arch/arm/mach-exynos/sec_boot.S b/arch/arm/mach-exynos/sec_boot.S
index 59d05e6..40c0720 100644
--- a/arch/arm/mach-exynos/sec_boot.S
+++ b/arch/arm/mach-exynos/sec_boot.S
@@ -21,7 +21,7 @@
 	.ltorg
 /*
  * Secondary core waits here until Primary wake it up.
- * Below code is copied to CONFIG_EXYNOS_RELOCATE_CODE_BASE.
+ * Below code is copied to (CONFIG_IRAM_TOP - 0x1000)
  * This is a workaround code which is supposed to act as a
  * substitute/supplement to the iROM code.
  *