drivers: display: uc81xx: add support for uc8175

Add support for uc8175 display driver. uc8175 has a slightly
different command/data length requirements for certain registers,
namely TRES and PTL, compared to uc8176/uc8179

This commit refactors the driver code and such that setting TRES and PTL
registers are now done by function pointers provided by config->quirks,
by the same token as how it is done for setting CDI register

Signed-off-by: Xiao Qin <xiaoq@google.com>