bhnd(4): Remove some double words in source code comments

- s/be be/be/
- s/is is/is/

MFC after:	3 days

sys/dev/bhnd/bhndb/bhndb.h

@@ -153,7 +153,7 @@ typedef enum {
 enum bhndb_alloc_flags {
 	/**
 	 * If resource overcommit prevents fulfilling a request for this
-	 * resource, an in-use resource should be be borrowed to fulfill the
+	 * resource, an in-use resource should be borrowed to fulfill the
 	 * request.
 	 * 
 	 * The only known use case is to support accessing the ChipCommon core

sys/dev/bhnd/cores/chipc/chipc.c

@@ -411,7 +411,7 @@ chipc_find_nvram_src(struct chipc_softc *sc, struct chipc_caps *caps)
 
 	/*
 	 * We check for hardware presence in order of precedence. For example,
-	 * SPROM is is always used in preference to internal OTP if found.
+	 * SPROM is always used in preference to internal OTP if found.
 	 */
 	if (CHIPC_QUIRK(sc, SUPPORTS_SPROM) && caps->sprom) {
 		srom_ctrl = bhnd_bus_read_4(sc->core, CHIPC_SPROM_CTRL);

sys/dev/bhnd/nvram/bhnd_nvram_value.c

@@ -1342,7 +1342,7 @@ bhnd_nvram_val_encode(bhnd_nvram_val *value, void *outp, size_t *olen,
  * Encode the given @p value's element as @p otype, writing the result to
  * @p outp.
  *
- * @param		inp	The element to be be encoded. Must be a value
+ * @param		inp	The element to be encoded. Must be a value
  *				previously returned by bhnd_nvram_val_next()
  *				or bhnd_nvram_val_elem().
  * @param		ilen	The size of @p inp, as returned by