staging: mt7621-pci: remove unused macro MV_READ_DATA

This macro is not being used at all along the code.
Just remove it.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/mt7621-pci/pci-mt7621.c

@@ -117,9 +117,6 @@
 	*(volatile u32 *)(RALINK_PCI_BASE+(ofs)) = cpu_to_le32(data)
 #define MV_READ(ofs, data)	\
 	*(data) = le32_to_cpu(*(volatile u32 *)(RALINK_PCI_BASE+(ofs)))
-#define MV_READ_DATA(ofs)	\
-	le32_to_cpu(*(volatile u32 *)(RALINK_PCI_BASE+(ofs)))
-
 #define MV_WRITE_16(ofs, data)	\
 	*(volatile u16 *)(RALINK_PCI_BASE+(ofs)) = cpu_to_le16(data)
 #define MV_READ_16(ofs, data)	\