[U-Boot] [PATCH 0/2] rockchip: tpl.c #ifdef fixes

[Chris Webb]

These are two trivial patches which fix up the #ifdef conditionals in
mach-rockchip/tpl.c to do the right thing in two configuration scenarios:

1. Debug UART enabled (for SPL and main U-Boot) but serial support disabled
for the TPL stage.

2. TPL banner disabled by unsetting CONFIG_TPL_BANNER_PRINT.

I stumbled over these edge cases while trying various permitted config
permutations, trying to make U-Boot less noisy without killing useful error
messages.

The diffs are against u-boot-rockchip.git: this already has changes that
haven't yet reached mainline u-boot yet, moving the relevant code from board
specific source files into the shared mach-rockchip/tpl.c.