ppc32: Fix BCSR_SIZE for MPC834x SYS

According to the 'MPC8349E MDS Processor Board User Manual Rev. 1.6'
the size of the BCSR mapping is 32kb.

Signed-off-by: Horst Kronstorfer <hkronsto@frequentis.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

arch/ppc/platforms/83xx/mpc834x_sys.h

@@ -23,7 +23,7 @@
 #define VIRT_IMMRBAR		((uint)0xfe000000)
 
 #define BCSR_PHYS_ADDR		((uint)0xf8000000)
-#define BCSR_SIZE		((uint)(128 * 1024))
+#define BCSR_SIZE		((uint)(32 * 1024))
 
 #define BCSR_MISC_REG2_OFF	0x07
 #define BCSR_MISC_REG2_PORESET	0x01