soc: fsl: qe: drop pointless check in qe_sdma_init()

The sdma member of struct qe_immap is not at offset zero, so even if
qe_immr wasn't initialized yet (i.e. NULL), &qe_immr->sdma would not
be NULL.
Reviewed-by: Timur Tabi <timur@kernel.org>
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Li Yang <leoyang.li@nxp.com>

drivers/soc/fsl/qe/qe.c

@@ -367,9 +367,6 @@ static int qe_sdma_init(void)
 	struct sdma __iomem *sdma = &qe_immr->sdma;
 	static s32 sdma_buf_offset = -ENOMEM;
 
-	if (!sdma)
-		return -ENODEV;
-
 	/* allocate 2 internal temporary buffers (512 bytes size each) for
 	 * the SDMA */
 	if (sdma_buf_offset < 0) {