misc: qfpfuse: Remove the support of fuse-write

The ioctl to write to fuse is no longer supported in the driver.

Change-Id: I1ed841de13f9ab45383e0d0914dbb39c67df8006
Acked-by: Jie Luo <jluo@qti.qualcomm.com>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>