smbios: add smbios 3.0 support

smbios: add smbios 3.0 support

This patch adds support for SMBIOS 3.0 entry point. When caller invokes
smbios_set_defaults(), it can specify entry point as 2.1 or 3.0. Then
smbios_get_tables() will return the entry point table in right format.

Acked-by: Gabriel Somlo <[email protected]>
Tested-by: Gabriel Somlo <[email protected]>
Tested-by: Leif Lindholm <[email protected]>
Signed-off-by: Wei Huang <[email protected]>
Reviewed-by: Laszlo Ersek <[email protected]>
Message-id: 1440615870[email protected]
Signed-off-by: Peter Maydell <[email protected]>