msm: mdss: hdmi: give multiple resolution info using sysfs node

Provide complete resolution details in a sysfs node "res_info"
limited to PAGE_SIZE. Different modules can query for multiple
resolution details based on the resolution ids received from
EDID of the TV.
In case resolution details exceed PAGE_SIZE, reuse res_info to
get remaining timing details by provide page details.

Change-Id: I3e8e8d4de29f78d22273b3fb8ff6a059a8cb19e1
Signed-off-by: Ajay Singh Parmar <aparmar@codeaurora.org>