drm/msm/dsi: Minor whitespace and style cleanup

drm/msm/dsi: Minor whitespace and style cleanup

Cleanup few obvious kernel coding style violations: missing or
unnecessary braces in 'if-else', unnecessary break lines, incorrect
breaking of long function declarations, unnecessary 'else' after a
'return'.  No functional impact expected.

Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/637305/
Link: https://lore.kernel.org/r/20250214-drm-msm-cleanups-v2-3-1bec50f37dc1@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>