MIPS: boot: Fixes for compressed/uart-16550.c
MIPS: boot: Fixes for compressed/uart-16550.c

Fix uart-16550.c for adding XLR/XLP support, changes are:
* Make register read/write use volatile pointers
* Support 32 bit IO read/write
* Increase timeout in waiting for UART LSR

Signed-off-by: Jayachandran C <1bc8cf2274d8680f3a9b88ac7b7d2a9e0d1d4ca2@broadcom.com>
Cc: 562397917b9a8bf316569a848858b12fb417723f@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5416/
Signed-off-by: Ralf Baechle <92f48d309cda194c8eda36aa8f9ae28c488fa208@linux-mips.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs