unicore32: Remove unused HAVE_ARCH_PCI_SET_DMA_MASK definition

HAVE_ARCH_PCI_SET_DMA_MASK is unused, so remove the #define for it.
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Acked-by: NGUAN Xuetao <gxt@mprc.pku.edu.cn>

arch/unicore32/include/mach/hardware.h

@@ -28,11 +28,6 @@
 #define PCIBIOS_MIN_IO			0x4000 /* should lower than 64KB */
 #define PCIBIOS_MIN_MEM			io_v2p(PKUNITY_PCIMEM_BASE)
 
-/*
- * We override the standard dma-mask routines for bouncing.
- */
-#define	HAVE_ARCH_PCI_SET_DMA_MASK
-
 #define pcibios_assign_all_busses()	1
 
 #endif  /* __MACH_PUV3_HARDWARE_H__ */