drm/xe/hwmon: Prevent unintended VRAM channel creation

drm/xe/hwmon: Prevent unintended VRAM channel creation

Remove the unnecessary VRAM channel entry introduced in xe_hwmon_channel.
Without this, adding any new hwmon channel causes extra VRAM channel
to appear. This remained unnoticed earlier because VRAM was the
final xe hwmon channel.

v2: Use MAX_VRAM_CHANNELS with in_range() instead of
    CHANNEL_VRAM_N_MAX. (Raag)

Fixes: 49a498338417 ("drm/xe/hwmon: Expose individual VRAM channel temperature")
Signed-off-by: Karthik Poosa <karthik.poosa@intel.com>
Reviewed-by: Raag Jadav <raag.jadav@intel.com>
Link: https://patch.msgid.link/20260206081655.2115439-1-karthik.poosa@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit 48eb073c7d95883eca2789447f94e1e8cafbabe5)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>