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/drivers/timer/stm32_timer.c b/drivers/timer/stm32_timer.c
index f07251e..1213a14 100644
--- a/drivers/timer/stm32_timer.c
+++ b/drivers/timer/stm32_timer.c
@@ -97,11 +97,11 @@
 	rate = clk_get_rate(&clk);
 
 	/* we set timer prescaler to obtain a 1MHz timer counter frequency */
-	psc = (rate / CONFIG_SYS_HZ_CLOCK) - 1;
+	psc = (rate / CFG_SYS_HZ_CLOCK) - 1;
 	writel(psc, &regs->psc);
 
 	/* Set timer frequency to 1MHz */
-	uc_priv->clock_rate = CONFIG_SYS_HZ_CLOCK;
+	uc_priv->clock_rate = CFG_SYS_HZ_CLOCK;
 
 	/* Configure timer for auto-reload */
 	setbits_le32(&regs->cr1, CR1_ARPE);