FROMLIST: remoteproc: qcom: pas: Drop unused dtb_mem_region field

dtb_mem_region is no longer referenced after the ioremap was moved
to respective places where mapping is required. Remove it from
struct qcom_pas.

Link: https://lore.kernel.org/lkml/20260325191301.164579-3-mukesh.ojha@oss.qualcomm.com/
Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>

Author: mukeshojha-linux

drivers/remoteproc/qcom_q6v5_pas.c

@@ -100,8 +100,9 @@ struct qcom_pas {
 	phys_addr_t mem_reloc;
 	phys_addr_t dtb_mem_reloc;
 	phys_addr_t region_assign_phys[MAX_ASSIGN_COUNT];
+
 	void *mem_region;
-	void *dtb_mem_region;
+
 	size_t mem_size;
 	size_t dtb_mem_size;
 	size_t region_assign_size[MAX_ASSIGN_COUNT];