tnc: notify fsp after pci enumeration

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
common: new command to display HOB information

A new command is introduced to display the HOB information.

============================8<============================
boot > hob
HOB list address: 0x3f420000

 No. | Address  | Type                 | Length in Bytes
-----|----------|----------------------|-----------------
 0   | 3f420000 | Hand-off             | 56
 1   | 3f420038 | GUID Extension       | 240
 2   | 3f420128 | GUID Extension       | 728
 3   | 3f420400 | GUID Extension       | 120
 4   | 3f420478 | Resource Descriptor  | 48
 5   | 3f4204a8 | Resource Descriptor  | 48
 6   | 3f4204d8 | Resource Descriptor  | 48
 7   | 3f420508 | Resource Descriptor  | 48
 8   | 3f420538 | Resource Descriptor  | 48
 9   | 3f420568 | Resource Descriptor  | 48
 10  | 3f420598 | Memory Allocation    | 48
 11  | 3f4205c8 | Memory Allocation    | 48
 12  | 3f4205f8 | Memory Allocation    | 48
 13  | 3f420628 | GUID Extension       | 4120
 14  | 3f421640 | Memory Allocation    | 48
 15  | 3f421670 | GUID Extension       | 432
 16  | 3f421820 | Memory Allocation    | 48
 17  | 3f421850 | Memory Allocation    | 48
 18  | 3f421880 | Memory Allocation    | 48
 19  | 3f4218b0 | Memory Allocation    | 48
 20  | 3f4218e0 | Memory Allocation    | 48
 21  | 3f421910 | Memory Allocation    | 48
 22  | 3f421940 | Memory Pool          | 24
 23  | 3f421958 | Memory Allocation    | 48
 24  | 3f421988 | Memory Allocation    | 48
 25  | 3f4219b8 | Memory Allocation    | 48
 26  | 3f4219e8 | Memory Pool          | 1032
 27  | 3f421df0 | Memory Allocation    | 48
 28  | 3f421e20 | Memory Pool          | 272
============================>8============================

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
crownbay: include hob command support in the board configuration

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
tnc: implement board_get_usable_ram_top()

FSP reserves part of the system high memory for its own job, thus the
top of memory should be adjusted otherwise later u-boot relocation
will overwrite these area.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>