phy: exynos5-usbdrd: convert some FIELD_PREP_CONST() to FIELD_PREP()

phy: exynos5-usbdrd: convert some FIELD_PREP_CONST() to FIELD_PREP()

Use of FIELD_PREP_CONST() was a thinko - it's meant to be used for
(constant) initialisers, not constant values.

Use FIELD_PREP() where possible. It has better error checking and is
therefore the preferred macro to use in those cases.

Signed-off-by: André Draszik <andre.draszik@linaro.org>
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20240710-phy-field-prep-v1-1-2fa3f7dc4fc7@linaro.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>