NTB: ntb_hw_idt: fix typo 'can by' to 'can be'

Signed-off-by: NWolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: NSerge Semin <fancer.lancer@gmail.com>
Signed-off-by: NJon Mason <jdmason@kudzu.us>

drivers/ntb/hw/idt/ntb_hw_idt.c

@@ -1401,7 +1401,7 @@ static int idt_ntb_peer_mw_clear_trans(struct ntb_dev *ntb, int pidx,
  *                          5. Doorbell operations
  *
  *    Doorbell functionality of IDT PCIe-switches is pretty unusual. First of
- * all there is global doorbell register which state can by changed by any
+ * all there is global doorbell register which state can be changed by any
  * NT-function of the IDT device in accordance with global permissions. These
  * permissions configs are not supported by NTB API, so it must be done by
  * either BIOS or EEPROM settings. In the same way the state of the global