x86, intel-mid: Remove "weak" from function declarations

For the following interfaces:

  get_penwell_ops()
  get_cloverview_ops()
  get_tangier_ops()

there is only one implementation, so they do not need to be marked "weak".

Remove the "weak" attribute from their declarations.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
CC: David Cohen <david.a.cohen@linux.intel.com>
CC: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
CC: x86@kernel.org