msm_fb: display: clean dsi fifo during dsi_off

During suspend, wait until dsi controller's fifo is
cleaned before disabling dsi controller. This will
prevent pixels that were left over in the fifo from
being displayed during next resume.

CRs-fixed: 336049
Signed-off-by: Kuogee Hsieh &lt;khsieh@codeaurora.org&gt;
(cherry picked from commit 9d76704c8dac8f9e0794834cc4d62c17fd9cdf63)

Change-Id: I324baf23e281e4e6831ac0c196fe101ed7690ac4
Signed-off-by: Srivalli Oguri &lt;oguri@codeaurora.org&gt;
pico_defconfig: latest regen

Change-Id: Ifb0a8e079df0a4d428a937a65204c6c37dfe1c0b
pico_defconfig: Increase vmalloc reserve to 32M
                CONFIG_HIGHMEM=y

Change-Id: I03a6c6749092c28f7e0b6b9aaaf408974ce664e6