dt-bindings: thermal: bcl: Update the interrupt name for bclv5

BCL driver supports a different set of interrupt names depicting the
mitigation levels instead of voltage and current violations.

Change-Id: I30c20576c81bc1215314244f3842aff672e9ca5f
Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>