sdcard_image: Copy user.txt/uEnv.txt if it exists in /boot
sdcard_image: Copy user.txt/uEnv.txt if it exists in /boot

Fixed a bug where the U-boot environment files are not copied to the boot partition if they
were installed in /boot by other recipes.

We should copy the uEnv.txt and user.txt always without placing a condition for the presence
of anything else in /boot. This is the original behavior of sdcard_image before the recent
wave of changes to it.

Signed-off-by: Joel A Fernandes <3df443c75905d44e28b3fa67deae36b0ea4fb64a@ti.com>
Signed-off-by: Koen Kooi <42e3d96910f922bdd7dd1805fe3f8aff634f391d@dominion.thruhere.net>

mrchapp/meta-ti-amsdk,rcn-ee/meta-ti,rcn-ee/meta-ti,Angstrom-distribution/meta-ti,tylerwhall/meta-ti,smoosvi/Test4,smoosvi/Test4,Angstrom-distribution/meta-ti,floft/meta-ti,rcn-ee/meta-ti,rvfh/meta-ti,RedFIR/meta-ti,treideme/meta-ti-rt,joelagnel/meta-ti,tylerwhall/meta-ti,rvfh/meta-ti,jumpnow/meta-ti,RedFIR/meta-ti,treideme/meta-ti-rt,RedFIR/meta-ti,joelagnel/meta-ti,jumpnow/meta-ti,tylerwhall/meta-ti,tylerwhall/meta-ti,joelagnel/meta-texasinstruments,joelagnel/meta-ti,joelagnel/meta-texasinstruments,floft/meta-ti,mrchapp/meta-ti-amsdk,rcn-ee/meta-ti,RedFIR/meta-ti,rvfh/meta-ti,joelagnel/meta-ti