ANDROID: GKI: Revert CONFIG_USB_XHCI_SIDEBAND from gki_defconfig

This reverts commit cf57490a.

The USB_XHCI_SIDEBAND driver is currently under development in the
upstream kernel. Enabling it in the Generic Kernel Image (GKI) at this
stage poses potential risks. The snapshot of the driver included in
android15-6.6 is an early revision and lacks several critical fixes
present in the latest upstream revisions.

Bug: 391779198
Bug: 399809445
Change-Id: Ifc0106e3773064b0e1ec5f770f22cb6ba68c4cad
Signed-off-by: Udipto Goswami <quic_ugoswami@quicinc.com>
Signed-off-by: Srinivasarao Pathipati <quic_c_spathi@quicinc.com>
Signed-off-by: Carlos Llamas <cmllamas@google.com>
(cherry picked from commit 3d4074a7)
Signed-off-by: Lee Jones <joneslee@google.com>