[jpege] Fix color conversion for BGRA
[jpege] Fix color conversion for BGRA

Before for non-zero colMCU ptr was set without taking into account
size of macropixel.

Issue: MDP-66145

Intel-Media-SDK/MediaSDK,Intel-Media-SDK/MediaSDK,Intel-Media-SDK/MediaSDK,Intel-Media-SDK/MediaSDK,Intel-Media-SDK/MediaSDK