ARM: dts: msm: Reduced Phy reset delay on SDX55

Since the phy needs only 70ms of delay after phy reset for the
registers to be read we are optimizing this value to improve
probe kpi for emac driver.

Change-Id: I29d1d4c6abb6dbe79ca5e8741354ae443c6b06bd
Acked-by: Abhishek Chauhan <abchauha@qti.qualcomm.com>
Signed-off-by: Sunil Paidimarri <hisunil@codeaurora.org>