AR5312 SoC flash controller maps the flash content to memory and
translates the memory access operations to the flash access operations.
Such controller is fully supported by the physmap-flash driver.

Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>R5312 SoC flash
Cc: Linux MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/8245/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>