phy: phy-snps-eusb2: refactor constructs names

As the driver now resides outside the phy subdirectory under a different
name, refactor all definitions, structures and functions to explicitly
specify what code is Qualcomm-specific and what is not.

Signed-off-by: Ivaylo Ivanov <[email protected]>
Reviewed-by: Dmitry Baryshkov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: ivoszbg