riscv: Rename __irq_wrapper to _isr_wrapper

For some reasons RISCV is the only arch where the vector table entry is
called __irq_wrapper instead of _isr_wrapper. This is not only a
cosmetic change but Zephyr expects the common ISR handler to be called
_isr_wrapper (for example when generating the IRQ vector table).

Change it.

find ./ -type f -exec sed -i 's/__irq_wrapper/_isr_wrapper/g' {} \;

Signed-off-by: Carlo Caione <ccaione@baylibre.com>

arch/riscv/core/isr.S

@@ -112,7 +112,7 @@ GDATA(_k_syscall_table)
 #endif
 
 /* exports */
-GTEXT(__irq_wrapper)
+GTEXT(_isr_wrapper)
 
 /* use ABI name of registers for the sake of simplicity */
 
@@ -140,7 +140,7 @@ GTEXT(__irq_wrapper)
 /*
  * Handler called upon each exception/interrupt/fault
  */
-SECTION_FUNC(exception.entry, __irq_wrapper)
+SECTION_FUNC(exception.entry, _isr_wrapper)
 
 #ifdef CONFIG_USERSPACE
 	/*