platform/x86/amd/hsmp: Check HSMP support on AMD family of processors

platform/x86/amd/hsmp: Check HSMP support on AMD family of processors

HSMP interface is supported only on few x86 processors from AMD.
Accessing HSMP registers on rest of the platforms might cause
unexpected behaviour. So add a check.

Also unavailability of this interface on rest of the processors
is not an error. Hence, use pr_info() instead of the pr_err() to
log the message.

Signed-off-by: Suma Hegde <[email protected]>
Reviewed-by: Naveen Krishna Chatradhi <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Hans de Goede <[email protected]>
Signed-off-by: Hans de Goede <[email protected]>