qseecom: deallocate the ion memory after unprotection
qseecom: deallocate the ion memory after unprotection

Deallocate the ion memory after the memory is no longer needed for
secure UI operations.

Change-Id: I6e314373d4ba796efe31ce3a40b4e211f0e2929c
Signed-off-by: Hariprasad Dhalinarasimha <f59ac8eef4ba99d0d5d05702dd0ebcce1c5f891c@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas