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The next SoC supports the same UART, but the register base will be
changed. Make it configurable.

Change-Id: Ida5c9151b2f3554afd15555b22838437eef443f7
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

This console driver sends '\r' before 'n', not after.
It works, but the convention is "\r\n" (i.e. CRLF)

Instead of fixing it in the driver, set CONSOLE_FLAG_TRANSLATE_CRLF
to leave it to the framework.

Change-Id: I2154e29313739a40dff70cfb5c0f8989136d4ad2
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

The legacy console is gone. Re-add the console support based on the
multi-console framework.

I am still keeping the putc, getc, and flush callbacks in
uniphier_console.S to use plat/common/aarch64/crash_console_helpers.S

The console registration code already relies on that C environment
has been set up. So, I just filled the struct console fields with the
callback pointers, then called console_register() directly. I also
re-implemented the init function in C to improve the readability.

Removing the custom crash console implementation has one disadvantage;
we cannot use the crash console on very early crashes because
crash_console_helpers.S works only after the console is registered.
I can live with this limitation.

Tested on my boards, and confirmed this worked like before.

Change-Id: Ieab9c849853ff6c525c15ea894a85944f257db59
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>