staging: gdm724x: remove redundant assignment of pointer w

staging: gdm724x: remove redundant assignment of pointer w

Pointer w is being assigned a value that is never read, it is
being re-assigned a new value later. The assignment is redundant
and can be removed.

Cleans up clan scan build warning:
drivers/staging/gdm724x/gdm_lte.c:198:2: warning: Value stored to 'w'
is never read [deadcode.DeadStores]

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20220307144603.136846-1-colin.i.king@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>