remoteproc: elf_loader: fix loading segment when is_iomem true

It seems luckliy work on i.MX platform, but it is wrong.
Need use memcpy_toio, not memcpy_fromio.

Fixes: 40df0a9 ("remoteproc: add is_iomem to da_to_va")
Tested-by: Dong Aisheng <aisheng.dong@nxp.com> (i.MX8MQ)
Reported-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>

drivers/remoteproc/remoteproc_elf_loader.c

@@ -216,7 +216,7 @@ int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
 		/* put the segment where the remote processor expects it */
 		if (filesz) {
 			if (is_iomem)
-				memcpy_fromio(ptr, (void __iomem *)(elf_data + offset), filesz);
+				memcpy_toio(ptr, (void __iomem *)(elf_data + offset), filesz);
 			else
 				memcpy(ptr, elf_data + offset, filesz);
 		}