omap: make overclocking possible (in theory)

This patch makes overclocking (in theory) possible by
introducing a new frequency step (new overclock value).
It also disables the smartreflex margin for the given
frequency step. Also added is a new DSP step to line
up with the frequencies for cpu.

DEFY_MPU_OPP5_FREQ defines the actual frequency for the
last frequency step. However, everything about 1.1 Ghz
won't boot correctly and crashes with a kernel panic
(on previous kernels it just wouldn't boot at all):

<4>[   30.509674] [<c00873cc>] (__wake_up_common+0x50/0x84) from [<c008cf50>] (__wake_up+0x4c/0x84)
<4>[   30.509704] [<c008cf50>] (__wake_up+0x4c/0x84) from [<c00b2a50>] (__wake_up_bit+0x2c/0x30)
<4>[   30.509735] [<c00b2a50>] (__wake_up_bit+0x2c/0x30) from [<c01628a8>] (end_bio_bh_io_sync+0x68/0x74)
<4>[   30.509765] [<c01628a8>] (end_bio_bh_io_sync+0x68/0x74) from [<c0166e70>] (bio_endio+0x50/0x54)
<4>[   30.509796] [<c0166e70>] (bio_endio+0x50/0x54) from [<c0263e2c>] (blk_update_request+0x200/0x464)
<4>[   30.509796] [<c0263e2c>] (blk_update_request+0x200/0x464) from [<c0266ac4>] (__blk_end_bidi_request+0x1c/0x80)
<4>[   30.509826] [<c0266ac4>] (__blk_end_bidi_request+0x1c/0x80) from [<c03d6254>] (mmc_blk_issue_rw_rq+0x550/0x6dc)
<4>[   30.509857] [<c03d6254>] (mmc_blk_issue_rw_rq+0x550/0x6dc) from [<c03d66b4>] (mmc_blk_issue_rq+0x2d4/0x2f4)
<4>[   30.509857] [<c03d66b4>] (mmc_blk_issue_rq+0x2d4/0x2f4) from [<c03d6ba0>] (mmc_queue_thread+0xec/0xf0)
<4>[   30.509887] [<c03d6ba0>] (mmc_queue_thread+0xec/0xf0) from [<c00b25e8>] (kthread+0x84/0x8c)
<4>[   30.509918] [<c00b25e8>] (kthread+0x84/0x8c) from [<c005c764>] (kernel_thread_exit+0x0/0x8)

This patch disables the introduced steps, they are only
for development purpose for now. For normal users only
the default voltage value is slightly lower for the highest
frequency.

Signed-off-by: Blechd0se <alex.christ@hotmail.de>