Revert "ARM: dts: msm: change emmc clock line drive strength"

This reverts commit 1a43560c.
This change caused regression that was fixed by commit
40c06a51 "ARM: dts: msm: Reduce drive
strength on SDC1 clk for MSM8974Pro AB MTP" which reduced the drive
strength to 10mA addressing data corruptions. This commit was introduced
to address potential CRC issues that could rise due to the low drive
strength. This isssue will be revisted if there are any CRC errors
reported later on.
Update copyright year.

CRs-Fixed: 600184
Change-Id: I7eb7d2532f826e8e9f875220daaa39335bb909a7
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>