staging: most: hdm-dim2: relocate variable declarations

This patch eliminates nested variable declarations by putting them at
the beginning of the function in order to flatten the code.

Signed-off-by: Andrey Shvetsov <andrey.shvetsov@k2l.de>
Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>