Correct TLVs_Area size computation

For the dynamic memory structure its size is equal to the T2T_Area
minus the DynLock_Area (if located within the T2T_Area) and the
Rsvd_Area(s). Bytes allocated to DynLock_Area and Rsvd_Area(s) are
returned by rw_t2t_is_lock_res_byte()

Bug: 169640640
Test: Tag R/W
Change-Id: I4fd8c81484ec75535234cd2f085cf9f76f59d1fe
1 file changed