Marvell: Update SDK_2.7.25 from RC32 to thunderbolt_v1

The only change in updating the buildroot half is the following
patch for GFLT400:

"""
MHSLPONLGCY-153 Add support for GMAC0 and GMAC1 bridging on AvantaMC

The SDK is based on RC32, and adds the functionality inside the
Traffic Processor Manager (TPM) to enable the bridging between
GMAC0 and GMAC1. We have defined a new ONU type, called
“OMCI_ONU_TYPE_1GE_1SGMI” and a new TPM profile called
“TPM_PON_G1_SGMII_WAN_G0_SINGLE_PORT”, which configures the packet
processor to act as a transparent bridge between GMAC0 and GMAC1.

The XML files for AVANTA_MC_RSFU product already contains the changes
needed to enable these profiles as well as other changes needed to
operate in this mode.
"""

This Patch spans across 3 repos:
    - kernel/prism: go/fibercl/82343
    - buildroot: this commit
    - vendor/marvell/applications: go/fibercl/82623

Patch applied by removing other files from replacing directory
names to match our structure:
"ConfigFiles/Products/AVANTA_MC_RSFU/FileSystem" -> "package/mv_app"

Files without patch end with .gflt110 (for compatability),
Files with patch applied end in .gflt400

Change-Id: Idb4c7ada334eb692765bba4b0c009908501b76e7
7 files changed