soc/rockchip/rk3288: Disable bootblock console

Bootblock space is tight on this SoC and recent changes increased it
ever so slightly to make this a problem.

Since the bootblock is well-tested, we can get by without console.

Change-Id: I7496a3e313b2c6ee6fb3c4671eac64376d84e0dc
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33068
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/rockchip/rk3288/Kconfig

@@ -30,6 +30,7 @@ config SOC_ROCKCHIP_RK3288
 	select MAINBOARD_HAS_NATIVE_VGA_INIT
 	select MAINBOARD_FORCE_NATIVE_VGA_INIT
 	select HAVE_LINEAR_FRAMEBUFFER
+	select NO_BOOTBLOCK_CONSOLE
 
 if SOC_ROCKCHIP_RK3288