dt-bindings: interrupt-controller: arm,gic: add ESPI and EPPI specifiers

Extended SPI and extended PPI interrupts are in the range [0-1023] and
[0-127] respectively, supported by GICv3.1.

Qualcomm SA8255p platform uses extended SPI for SCMI 'a2p' doorbells.
Signed-off-by: Nikunj Kela <quic_nkela@quicinc.com>
Link: https://lore.kernel.org/r/20240910162637.2382656-1-quic_nkela@quicinc.comSigned-off-by: Rob Herring (Arm) <robh@kernel.org>

include/dt-bindings/interrupt-controller/arm-gic.h

@@ -12,6 +12,8 @@
 
 #define GIC_SPI 0
 #define GIC_PPI 1
+#define GIC_ESPI 2
+#define GIC_EPPI 3
 
 /*
  * Interrupt specifier cell 2.