Qorvo pac55xx: initial support

Qorvo (Nee Active Semi) PAC55xx "Intelligent Motor Control" parts,
cortex-m4 SoCs

include/libopencm3/dispatch/nvic.h

@@ -78,6 +78,9 @@
 #elif defined(SWM050)
 #       include <libopencm3/swm050/nvic.h>
 
+#elif defined(PAC55XX)
+#       include <libopencm3/pac55xx/nvic.h>
+
 #else
 #	warning"no interrupts defined for chipset; NVIC_IRQ_COUNT = 0"
 

include/libopencm3/pac55xx/irq.json

@@ -0,0 +1,38 @@
+{
+    "irqs": [
+        "memctl",
+        "wdt",
+        "rtc",
+        "adc0",
+        "adc1",
+        "adc2",
+        "adc3",
+        "timera",
+        "timerb",
+        "timerc",
+        "timerd",
+        "timera_qep",
+        "timerb_qep",
+        "timerc_qep",
+        "timerd_qep",
+        "gpioa",
+        "gpiob",
+        "gpioc",
+        "gpiod",
+        "gpioe",
+        "gpiof",
+        "gpiog",
+        "i2c",
+        "usarta",
+        "usartb",
+        "usartc",
+        "usartd",
+        "can",
+        "gptimera",
+        "gptimerb",
+        "scc"
+    ],
+    "partname_humanreadable": "PAC55XX Series",
+    "partname_doxygen": "PAC55XX",
+    "includeguard": "LIBOPENCM3_PAC55XX_H_"
+}