Doc: networking: Fix typo in dsa

This patch fix typos in Documentation/networking/dsa.
Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/networking/dsa/bcm_sf2.txt

@@ -38,7 +38,7 @@ Implementation details
 ======================
 
 The driver is located in drivers/net/dsa/bcm_sf2.c and is implemented as a DSA
-driver; see Documentation/networking/dsa/dsa.txt for details on the subsytem
+driver; see Documentation/networking/dsa/dsa.txt for details on the subsystem
 and what it provides.
 
 The SF2 switch is configured to enable a Broadcom specific 4-bytes switch tag

Documentation/networking/dsa/dsa.txt

@@ -334,7 +334,7 @@ more specifically with its VLAN filtering portion when configuring VLANs on top
 of per-port slave network devices. Since DSA primarily deals with
 MDIO-connected switches, although not exclusively, SWITCHDEV's
 prepare/abort/commit phases are often simplified into a prepare phase which
-checks whether the operation is supporte by the DSA switch driver, and a commit
+checks whether the operation is supported by the DSA switch driver, and a commit
 phase which applies the changes.
 
 As of today, the only SWITCHDEV objects supported by DSA are the FDB and VLAN