[CELL] spufs: remove needless context save/restore code

The following steps are not needed in the SPE context save/restore
paths:

Save Step 12: save_mfc_decr()
save suspend_time to CSA (It will be done by step 14)
save ch 7 (decrementer value will be saved in LSCSA by spe-side step 10)

Restore Step 59: restore_ch_part1()
restore ch 1 (it will be done by spe-side step 15)

This change removes the unnecessary steps.

Signed-off-by: Masato Noguchi <[e-mail]>
Signed-off-by: Jeremy Kerr <[e-mail]>
Signed-off-by: Arnd Bergmann <[e-mail]>

arch/powerpc/platforms/cell/spufs/switch.c

···
 	 */
 	if (in_be64(&priv2->mfc_control_RW) & MFC_CNTL_DECREMENTER_RUNNING) {
 		csa->priv2.mfc_control_RW |= MFC_CNTL_DECREMENTER_RUNNING;
-		csa->suspend_time = get_cycles();
-		out_be64(&priv2->spu_chnlcntptr_RW, 7ULL);
-		eieio();
-		csa->spu_chnldata_RW[7] = in_be64(&priv2->spu_chnldata_RW);
-		eieio();
 	} else {
 		csa->priv2.mfc_control_RW &= ~MFC_CNTL_DECREMENTER_RUNNING;
 	}
···
 	int i;
 
 	/* Restore, Step 59:
+	 *	Restore the following CH: [0,3,4,24,25,27]
 	 */
-
-	/* Restore CH 1 without count */
-	out_be64(&priv2->spu_chnlcntptr_RW, 1);
-	out_be64(&priv2->spu_chnldata_RW, csa->spu_chnldata_RW[1]);
-
-	/* Restore the following CH: [0,3,4,24,25,27] */
 	for (i = 0; i < ARRAY_SIZE(ch_indices); i++) {
 		idx = ch_indices[i];
 		out_be64(&priv2->spu_chnlcntptr_RW, idx);