Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/drivers/isdn/hisax/hfc_pci.c b/drivers/isdn/hisax/hfc_pci.c
index 3147020..0cb0546 100644
--- a/drivers/isdn/hisax/hfc_pci.c
+++ b/drivers/isdn/hisax/hfc_pci.c
@@ -146,7 +146,7 @@
 	/* D- and monitor/CI channel are not enabled */
 	/* STIO1 is used as output for data, B1+B2 from ST->IOM+HFC */
 	/* STIO2 is used as data input, B1+B2 from IOM->ST */
-	/* ST B-channel send disabled -> continous 1s */
+	/* ST B-channel send disabled -> continuous 1s */
 	/* The IOM slots are always enabled */
 	cs->hw.hfcpci.conn = 0x36;	/* set data flow directions */
 	Write_hfc(cs, HFCPCI_CONNECT, cs->hw.hfcpci.conn);