net: sched: Fix spelling mistakes

Fix some spelling mistakes in comments:
sevaral  ==> several
sugestion  ==> suggestion
unregster  ==> unregister
suplied  ==> supplied
cirsumstances  ==> circumstances
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Link: https://lore.kernel.org/r/20210531020048.2920054-1-zhengyongjun3@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

net/sched/cls_rsvp.h

@@ -7,7 +7,7 @@
 
 /*
    Comparing to general packet classification problem,
-   RSVP needs only sevaral relatively simple rules:
+   RSVP needs only several relatively simple rules:
 
    * (dst, protocol) are always specified,
      so that we are able to hash them.

net/sched/ematch.c

@@ -141,7 +141,7 @@ int tcf_em_register(struct tcf_ematch_ops *ops)
 EXPORT_SYMBOL(tcf_em_register);
 
 /**
- * tcf_em_unregister - unregster and extended match
+ * tcf_em_unregister - unregister and extended match
  *
  * @ops: ematch operations lookup table
  *

net/sched/sch_gred.c

@@ -6,7 +6,7 @@
  *
  *             991129: -  Bug fix with grio mode
  *		       - a better sing. AvgQ mode with Grio(WRED)
- *		       - A finer grained VQ dequeue based on sugestion
+ *		       - A finer grained VQ dequeue based on suggestion
  *		         from Ren Liu
  *		       - More error checks
  *

net/sched/sch_htb.c

@@ -52,7 +52,7 @@
 */
 
 static int htb_hysteresis __read_mostly = 0; /* whether to use mode hysteresis for speedup */
-#define HTB_VER 0x30011		/* major must be matched with number suplied by TC as version */
+#define HTB_VER 0x30011		/* major must be matched with number supplied by TC as version */
 
 #if HTB_VER >> 16 != TC_HTB_PROTOVER
 #error "Mismatched sch_htb.c and pkt_sch.h"
@@ -523,7 +523,7 @@ htb_class_mode(struct htb_class *cl, s64 *diff)
  * htb_change_class_mode - changes classe's mode
  *
  * This should be the only way how to change classe's mode under normal
- * cirsumstances. Routine will update feed lists linkage, change mode
+ * circumstances. Routine will update feed lists linkage, change mode
  * and add class to the wait event queue if appropriate. New mode should
  * be different from old one and cl->pq_key has to be valid if changing
  * to mode other than HTB_CAN_SEND (see htb_add_to_wait_tree).