The 'struct device' pointer is already cached as a local variable in
ufshcd_pltfrm_init(), so use it.

Link: https://lore.kernel.org/r/20220401085050.119323-1-krzysztof.kozlowski@linaro.orgReviewed-by: Chanho Park <chanho61.park@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>