rt5631: fix hdmi set spk error

rt5631: fix hdmi set spk error
[  415.288635] Unable to handle kernel paging request at virtual address ffffffd2
[  415.295881] pgd = c0404000
[  415.298737] [ffffffd2] *pgd=8edfe821, *pte=00000000, *ppte=00000000
[  415.305203] Internal error: Oops: 17 [#1] PREEMPT SMP
[  415.310281] CPU: 0    Tainted: G         C   (3.0.8+ #6)
	[  415.315635] PC is at dapm_seq_check_event+0x78/0x110
	[  415.320622] LR is at dapm_seq_run_coalesced+0x118/0x150
	[  415.325873] pc : [<c07b6dac>]    lr : [<c07b6f5c>]    psr: 80000013
	[  415.325891] sp : ee855e30  ip : 00000014  fp : 00000001
	[  415.337382] r10: 00000003  r9 : c0ade668  r8 : ffffffff
	[  415.342625] r7 : ee855e98  r6 : 00000002  r5 : c0a33820  r4 : ffffff9e
	[  415.349169] r3 : 00000001  r2 : c0ade668  r1 : ffffff9e  r0 : ed544cac
	[  415.355720] Flags: Nzcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
	[  415.363047] Control: 10c53c7d  Table: 8d22404a  DAC: 00000015
	[  415.368804]
	[  415.368813] PC: 0xc07b6d2c:
	[  415.373097] 6d2c  e8bd4010 ea05c6c1 e2423001 e92d4073 e1a06002 e1a04001 e5902064 e3530007
	[  415.381420] 6d4c  979ff103 ea000010 c07b6da4 c07b6d74 c07b6d98 c07b6d80 c07b6d98 c07b6d98
	[  415.389742] 6d6c  c07b6d98 c07b6d8c e3a03001 e59f50a8 ea00000a e3a03000 e59f50a0 ea000007
	[  415.398054] 6d8c  e3a03000 e59f5098 ea000004 e59f0094 e3a01d0d ebf5042f e59f508c e3a03001
	[  415.406359] 6dac  e5d41034 e2011001 e1510003 1a000018 e5943044 e3530000 0a000015 e1d434b0
	[  415.414674] 6dcc  e1160003 0a000012 e58d5000 e5921164 e5943004 e590005c e59f2050 ebffffab
	[  415.422996] 6dec  e1a00004 e1a02006 e3a01000 e1a0e00f e594f044 e2503000 aa000005 e1a01005
	[  415.431321] 6e0c  e5942004 e59f0028 e28dd008 e8bd4070 ea05c1df e28dd008 e8bd8070 c0a33820