cpu/amd/agesa/family15tn/Kconfig: Remove unneeded UDELAY_LAPIC

Commit

    commit 825c78b5da
    Author: David Hubbard <david.c.hubbard+coreboot@gmail.com>
    Date:   Thu May 2 18:06:03 2013 -0600

        mainboard/{asus/f2a85-m,amd/thatcher}: move UDELAY_LAPIC

        Reviewed-on: http://review.coreboot.org/3178

adds `UDELAY_LAPIC` to `cpu/amd/agesa/family15tn/Kconfig`. This is
not needed, because since commit

    commit e135ac5a7e
    Author: Patrick Georgi <patrick.georgi@secunet.com>
    Date:   Tue Nov 20 11:53:47 2012 +0100

        Remove AMD special case for LAPIC based udelay()

        Reviewed-on: http://review.coreboot.org/1618

`select UDELAY_LAPIC` is present in `src/cpu/amd/agesa/Kconfig` which
applies also to AMD Family 15tn.

Therefore remove `select UDELAY_LAPIC` again from
`cpu/amd/agesa/family15tn/Kconfig`.

Change-Id: I98b783a97c4a1e45ecb29b776cb3d3877bad9c0f
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: http://review.coreboot.org/3179
Tested-by: build bot (Jenkins)
Reviewed-by: Peter Stuge <peter@stuge.se>

src/cpu/amd/agesa/family15tn/Kconfig

@@ -21,7 +21,6 @@ config CPU_AMD_AGESA_FAMILY15_TN
 	bool
 	select PCI_IO_CFG_EXT
 	select X86_AMD_FIXED_MTRRS
-	select UDELAY_LAPIC
 
 config CPU_ADDR_BITS
 	int