(console,drivers/uart)/Kconfig: Fix dependencies

The dependencies of CONSOLE_SERIAL and DRIVERS_UART were somehow
backwards. Fix that. Now, CONSOLE_SERIAL depends on DRIVERS_UART,
because it's using its interface. The individual UART drivers
select DRIVERS_UART, because they implement the interface and
depend on the common UART code.

Some guards had to be fixed (using CONSOLE_SERIAL now instead of
DRIVERS_UART). Some other guards that were only about compilation
of units were removed. We want to build test as much as possible,
right?

Change-Id: I0ea73a8909f07202b23c88db93df74cf9dc8abf9
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/29572
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/cpu/allwinner/a10/Makefile.inc

@@ -21,11 +21,9 @@ ramstage-y	+= monotonic_timer.c
 ramstage-y	+= timer.c
 ramstage-y	+= twi.c
 
-ifeq ($(CONFIG_DRIVERS_UART),y)
-bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += uart.c uart_console.c
+bootblock-y	+= uart.c uart_console.c
 romstage-y	+= uart.c uart_console.c
 ramstage-y	+= uart.c uart_console.c
-endif
 
 real-target: $(obj)/BOOT0
 

src/cpu/ti/am335x/Makefile.inc

@@ -12,11 +12,9 @@ ramstage-y	+= monotonic_timer.c
 ramstage-y	+= nand.c
 ramstage-y	+= cbmem.c
 
-ifeq ($(CONFIG_DRIVERS_UART),y)
-bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += uart.c
+bootblock-y	+= uart.c
 romstage-y	+= uart.c
 ramstage-y	+= uart.c
-endif
 
 $(call add-class,omap-header)
 $(eval $(call create_class_compiler,omap-header,arm))