uniphier: Use generic console_t data structure ...

Since now the generic console_t structure holds the UART base address as
well, let's use that generic location and drop the UART driver specific
data structure at all.

Change-Id: Ia9d996bb45ff3a7f1b240f12fd75805b48a048e9
Signed-off-by: Andre Przywara <andre.przywara@arm.com>

uniphier: make UART base address configurable ...

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>

uniphier: set CONSOLE_FLAG_TRANSLATE_CRLF and clean up console driver ...

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>

uniphier: support console based on multi-console ...

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>