USB: dwc3: Add support for overriding HSPHY parameters

USB complaince requires overriding HSPHY parameters like
VBUS valid threshold, disconnect valid threshold, DC voltage
level, preemphasis, rise and fall time. Hence add support for
overriding HSPHY parameters by writing to QSCRATCH register.

CRs-Fixed: 429028
Change-Id: I511c4cdc424dc3316365572cf5d9eb19ec771b15
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>
2 files changed