feat(qti): reorganize bear-based SoCs under a common family directory

Group the bear SoC platforms (mdm9607, msm8909, msm8916, msm8939)
under a new plat/qti/bear/ directory to better classify and or

feat(qti): reorganize bear-based SoCs under a common family directory

Group the bear SoC platforms (mdm9607, msm8909, msm8916, msm8939)
under a new plat/qti/bear/ directory to better classify and organize
the platform code by SoC family.

The following SoC platforms are grouped under plat/qti/bear/:

mdm9607: Qualcomm MDM9607 SoC
msm8909: Qualcomm MSM8909 SoC
msm8916: Qualcomm MSM8916 SoC (Cortex-A7/A53, GICv2)
msm8939: Qualcomm MSM8939 SoC

Change-Id: I337f6e0c64a91c79405fd2df234531c7733b83f2
Signed-off-by: dongnanw <dongnanw@qti.qualcomm.com>

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