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794245fa71
Use "bx lr", or "pop {lr}", which do proper mode switching
between thumb and arm modes. A plain "mov pc, lr" does not switch
from thumb mode to arm mode (while in arm mode, it does switch
mode for a thumb caller).
This is normally not an issue, as CONFIG_THUMB only is enabled if
the C compiler defaults to thumb; but stick to patterns that can
do mode switching if needed, for consistency.
Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit 77e6293735262b20a86b5047b77991a86cf4e9e1)