ARM: dts: msm: Update TUNE1 and TUNE2 values for ATOLL

Update TUNE1 value to enhance HSTX eye margin for better
compliance and TUNE2 value to improve the hs_disconnect
level for Highspeed PHY on Atoll.

Change-Id: Ie68105162c7ffa13807a27cef62f9950e9980eb4
Signed-off-by: Sriharsha Allenki <sallenki@codeaurora.org>