tsnep: Fix s390 devm_ioremap_resource warning

The following warning is fixed with additional config dependencies:

s390-linux-ld: drivers/net/ethernet/engleder/tsnep_main.o: in function `tsnep_probe':
tsnep_main.c:(.text+0x1de6): undefined reference to `devm_ioremap_resource'
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Link: https://lore.kernel.org/r/20211216200154.1520-1-gerhard@engleder-embedded.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/engleder/Kconfig

@@ -18,6 +18,7 @@ if NET_VENDOR_ENGLEDER
 
 config TSNEP
 	tristate "TSN endpoint support"
+	depends on HAS_IOMEM && HAS_DMA
 	depends on PTP_1588_CLOCK_OPTIONAL
 	select PHYLIB
 	help