global: Move remaining CONFIG_SYS_* to CFG_SYS_*

The rest of the unmigrated CONFIG symbols in the CONFIG_SYS namespace do
not easily transition to Kconfig. In many cases they likely should come
from the device tree instead. Move these out of CONFIG namespace and in
to CFG namespace.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/mach-at91/armv7/clock.c b/arch/arm/mach-at91/armv7/clock.c
index aa6bb6b..6bfa02d 100644
--- a/arch/arm/mach-at91/armv7/clock.c
+++ b/arch/arm/mach-at91/armv7/clock.c
@@ -28,7 +28,7 @@
 {
 	switch (css) {
 	case AT91_PMC_MCKR_CSS_SLOW:
-		return CONFIG_SYS_AT91_SLOW_CLOCK;
+		return CFG_SYS_AT91_SLOW_CLOCK;
 	case AT91_PMC_MCKR_CSS_MAIN:
 		return gd->arch.main_clk_rate_hz;
 	case AT91_PMC_MCKR_CSS_PLLA:
@@ -58,7 +58,7 @@
 {
 	unsigned freq, mckr;
 	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
-#ifndef CONFIG_SYS_AT91_MAIN_CLOCK
+#ifndef CFG_SYS_AT91_MAIN_CLOCK
 	unsigned tmp;
 	/*
 	 * When the bootloader initialized the main oscillator correctly,
@@ -71,7 +71,7 @@
 			tmp = readl(&pmc->mcfr);
 		} while (!(tmp & AT91_PMC_MCFR_MAINRDY));
 		tmp &= AT91_PMC_MCFR_MAINF_MASK;
-		main_clock = tmp * (CONFIG_SYS_AT91_SLOW_CLOCK / 16);
+		main_clock = tmp * (CFG_SYS_AT91_SLOW_CLOCK / 16);
 	}
 #endif
 	gd->arch.main_clk_rate_hz = main_clock;
@@ -271,7 +271,7 @@
 	clk_source = regval & AT91_PMC_PCR_GCKCSS;
 	switch (clk_source) {
 	case AT91_PMC_PCR_GCKCSS_SLOW_CLK:
-		freq = CONFIG_SYS_AT91_SLOW_CLOCK;
+		freq = CFG_SYS_AT91_SLOW_CLOCK;
 		break;
 	case AT91_PMC_PCR_GCKCSS_MAIN_CLK:
 		freq = gd->arch.main_clk_rate_hz;