MIPS: JZ4740: Add prom support
MIPS: JZ4740: Add prom support

Add support for initializing arcs_cmdline on JZ4740 based machines and
provides a prom_putchar implementation.

Signed-off-by: Lars-Peter Clausen <3318dc5ce3e4fb7c28a0b841b6801c884e1d0896@metafoo.de>
Cc: 562397917b9a8bf316569a848858b12fb417723f@linux-mips.org
Cc: 2578944098299abf708b08eff6fcf60565553586@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1404/
Signed-off-by: Ralf Baechle <92f48d309cda194c8eda36aa8f9ae28c488fa208@linux-mips.org>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs