misc: xilinx-sdfec: cleanup return value in xsdfec_table_write()

Return 0 for success, rather than the value of an incrementing
"reg" index. The reg value was never actually used, so this
simplifies the caller slightly.

Cc: Derek Kiernan <derek.kiernan@xilinx.com>
Cc: Dragan Cvetic <dragan.cvetic@xilinx.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Link: https://lore.kernel.org/r/20200527012628.1100649-3-jhubbard@nvidia.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/misc/xilinx_sdfec.c

@@ -648,7 +648,7 @@ static int xsdfec_table_write(struct xsdfec_dev *xsdfec, u32 offset,
 			 ((reg * XSDFEC_REG_WIDTH_JUMP) % PAGE_SIZE));
 		put_page(pages[i]);
 	}
-	return reg;
+	return 0;
 }
 
 static int xsdfec_add_ldpc(struct xsdfec_dev *xsdfec, void __user *arg)
@@ -722,8 +722,6 @@ static int xsdfec_add_ldpc(struct xsdfec_dev *xsdfec, void __user *arg)
 	ret = xsdfec_table_write(xsdfec, 4 * ldpc->qc_off, ldpc->qc_table,
 				 ldpc->nqc, XSDFEC_LDPC_QC_TABLE_ADDR_BASE,
 				 XSDFEC_QC_TABLE_DEPTH);
-	if (ret > 0)
-		ret = 0;
 err_out:
 	kfree(ldpc);
 	return ret;