staging: vt6655: Added missing BE support in CARDbGetCurrentTSF

Added missing big-endian support in CARDbGetCurrentTSF.

Reported-by: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/25c80e3eb889ef2e530f26b4a97a9f5fe88e01ab.1651431640.git.philipp.g.hortmann@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>