USB: cdc.h: ncm: typo and style fixes

Some typos were in the initial commit, make the spelling
according to the spec.

Add some more comments.

Also change constant names according to the style of the rest
of the file

Signed-off-by: Yauheni Kaliuta <yauheni.kaliuta@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

include/linux/usb/cdc.h

@@ -274,13 +274,13 @@ struct usb_cdc_notification {
 /*
  * Class Specific structures and constants
  *
- * CDC NCM parameter structure, CDC NCM subclass 6.2.1
+ * CDC NCM NTB parameters structure, CDC NCM subclass 6.2.1
  *
  */
 
-struct usb_cdc_ncm_ntb_parameter {
+struct usb_cdc_ncm_ntb_parameters {
 	__le16	wLength;
-	__le16	bmNtbFormatSupported;
+	__le16	bmNtbFormatsSupported;
 	__le32	dwNtbInMaxSize;
 	__le16	wNdpInDivisor;
 	__le16	wNdpInPayloadRemainder;
@@ -297,8 +297,8 @@ struct usb_cdc_ncm_ntb_parameter {
  * CDC NCM transfer headers, CDC NCM subclass 3.2
  */
 
-#define NCM_NTH16_SIGN		0x484D434E /* NCMH */
-#define NCM_NTH32_SIGN		0x686D636E /* ncmh */
+#define USB_CDC_NCM_NTH16_SIGN		0x484D434E /* NCMH */
+#define USB_CDC_NCM_NTH32_SIGN		0x686D636E /* ncmh */
 
 struct usb_cdc_ncm_nth16 {
 	__le32	dwSignature;
@@ -320,23 +320,25 @@ struct usb_cdc_ncm_nth32 {
  * CDC NCM datagram pointers, CDC NCM subclass 3.3
  */
 
-#define NCM_NDP16_CRC_SIGN	0x314D434E /* NCM1 */
-#define NCM_NDP16_NOCRC_SIGN	0x304D434E /* NCM0 */
-#define NCM_NDP32_CRC_SIGN	0x316D636E /* ncm1 */
-#define NCM_NDP32_NOCRC_SIGN	0x306D636E /* ncm0 */
+#define USB_CDC_NCM_NDP16_CRC_SIGN	0x314D434E /* NCM1 */
+#define USB_CDC_NCM_NDP16_NOCRC_SIGN	0x304D434E /* NCM0 */
+#define USB_CDC_NCM_NDP32_CRC_SIGN	0x316D636E /* ncm1 */
+#define USB_CDC_NCM_NDP32_NOCRC_SIGN	0x306D636E /* ncm0 */
 
+/* 16-bit NCM Datagram Pointer Table */
 struct usb_cdc_ncm_ndp16 {
 	__le32	dwSignature;
 	__le16	wLength;
 	__le16	wNextFpIndex;
 	__u8	data[0];
 } __attribute__ ((packed));
 
+/* 32-bit NCM Datagram Pointer Table */
 struct usb_cdc_ncm_ndp32 {
 	__le32	dwSignature;
 	__le16	wLength;
 	__le16	wReserved6;
-	__le32	dwNextFpIndex;
+	__le32	dwNextNdpIndex;
 	__le32	dwReserved12;
 	__u8	data[0];
 } __attribute__ ((packed));