config: change CONFIG_CMA_SIZE_MBYTES to 64

hulk inclusion
category: bugfix
bugzilla: 9507
CVE: NA

-------------------------------------------------

Change CONFIG_CMA_SIZE_MBYTES to 64 to resolve
boot problem on D05 with mpt3sas_cm0 driver error.

[  212.262711] mpt3sas_cm0: Command Timeout
[  212.262712] mf:

[  212.262714] 0100000d
[  212.262715] 00000100
[  212.262716] 00000000
[  212.262717] 00000000
[  212.262718] 00000000
[  212.262719] 00000000
[  212.262720] 00000000
[  212.262721] 00000000
[  212.262722]

[  212.262723] 00000000
[  212.262724] 00000000
[  212.262724] 00000000
[  212.262725] 00000000
[  212.262726] 000009d0

[  222.506714] mpt3sas_cm0: sending diag reset !!

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>