bsps/xqspipsu: Ensure NOR writes align

This change causes NOR writes to be broken according to page boundaries.
Writes across page boundaries cause the writes beyond the boundary to
fail silently. This also introduces a new function that will explicitly
write pages.

bsps/include/dev/spi/xqspipsu-flash-helper.h

@@ -49,11 +49,34 @@ int QspiPsu_NOR_Erase(
  * @note	None.
  *
  ******************************************************************************/
+int QspiPsu_NOR_Write_Page(
+  XQspiPsu *QspiPsuPtr,
+  u32 Address,
+  u32 ByteCount,
+  u8 *WriteBfrPtr
+);
+
+/*****************************************************************************/
+/**
+ *
+ * This function writes to the serial Flash connected to the QSPIPSU interface.
+ * Writes will be broken into device page sized and aligned writes as necessary.
+ *
+ * @param	QspiPsuPtr is a pointer to the QSPIPSU driver component to use.
+ * @param	Address contains the address to write data to in the Flash.
+ * @param	ByteCount contains the number of bytes to write.
+ * @param	WriteBfrPtr is pointer to the write buffer (which is to be transmitted)
+ *
+ * @return	XST_SUCCESS if successful, else XST_FAILURE.
+ *
+ * @note	None.
+ *
+ ******************************************************************************/
 int QspiPsu_NOR_Write(
   XQspiPsu *QspiPsuPtr,
   u32 Address,
   u32 ByteCount,
-	u8 *WriteBfrPtr
+  u8 *WriteBfrPtr
 );
 
 /*****************************************************************************/