arm/dt: msm8974: set HSPHY init sequence for USB3

On some platforms, PARAMETER_OVERRIDE_A/B/C/D registers are used
for setting parameters like VBUS valid threshold, disconnect valid
threshold, DC voltage level, preemphasis and raise/fall times for
HSUSB compliance. On 8974 platform, QSCRATCH register is used for
setting these override parameters. This 32 bit value represents
as follows, where
	bits 0-5   PARAMETER_OVERRIDE_A
	bits 6-12  PARAMETER_OVERRIDE_B
	bits 13-19 PARAMETER_OVERRIDE_C
	bits 20-25 PARAMETER_OVERRIDE_D.
Hence set HSPHY init sequence to be used for USB3 controller.

Change-Id: I04f1bee82583f225b6e4c2fd4041c19703e401f2
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>
2 files changed