Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>

drivers/net/fec.h

@@ -97,11 +97,11 @@ struct bufdesc {
  *	The following definitions courtesy of commproc.h, which where
  *	Copyright (c) 1997 Dan Malek (dmalek@jlc.net).
  */
-#define BD_SC_EMPTY     ((ushort)0x8000)        /* Recieve is empty */
+#define BD_SC_EMPTY     ((ushort)0x8000)        /* Receive is empty */
 #define BD_SC_READY     ((ushort)0x8000)        /* Transmit is ready */
 #define BD_SC_WRAP      ((ushort)0x2000)        /* Last buffer descriptor */
 #define BD_SC_INTRPT    ((ushort)0x1000)        /* Interrupt on change */
-#define BD_SC_CM        ((ushort)0x0200)        /* Continous mode */
+#define BD_SC_CM        ((ushort)0x0200)        /* Continuous mode */
 #define BD_SC_ID        ((ushort)0x0100)        /* Rec'd too many idles */
 #define BD_SC_P         ((ushort)0x0100)        /* xmt preamble */
 #define BD_SC_BR        ((ushort)0x0020)        /* Break received */