POWERPC: Get rid of remapping the whole immr

The stuff below cleans up the code attempting to remap the whole cpm2_immr
early, as well as places happily assuming that fact. This is more like the 2.4
legacy stuff, and is at least confusing and unclear now.

To keep the world comfortable, a new mechanism is introduced: before accessing
specific immr register/register set, one needs to map it, using cpm2_map(<reg>),
for instance, access to CPM command register will look like
	volatile cpm_cpm2_t *cp = cpm2_map(im_cpm);
keeping the code clear, yet without "already defined somewhere" cpm2_immr.

So far, unmapping code is not implemented, but it's not a big deal to add it,
if the whole idea makes sense.

Signed-off-by: Vitaly Bordug <vbordug@ru.mvista.com>

include/asm-ppc/cpm2.h

@@ -177,6 +177,10 @@ typedef struct cpm_buf_desc {
 #define PROFF_I2C_BASE		((uint)0x8afc)
 #define PROFF_IDMA4_BASE	((uint)0x8afe)
 
+#define PROFF_SCC_SIZE		((uint)0x100)
+#define PROFF_FCC_SIZE		((uint)0x100)
+#define PROFF_SMC_SIZE		((uint)64)
+
 /* The SMCs are relocated to any of the first eight DPRAM pages.
  * We will fix these at the first locations of DPRAM, until we
  * get some microcode patches :-).

include/asm-ppc/fs_pd.h

@@ -29,4 +29,8 @@ static inline int uart_clock(void)
 	return (((bd_t *) __res)->bi_intfreq);
 }
 
+#define cpm2_map(member)	(&cpm2_immr->member)
+#define cpm2_map_size(member, size)	(&cpm2_immr->member)
+#define cpm2_unmap(addr)        do {} while(0)
+
 #endif