soc: riscv: sensry: Remove __soc_is_irq and disable unused config

The sy1xx SoC enabled CONFIG_RISCV_SOC_EXCEPTION_FROM_IRQ and provided
its own __soc_is_irq implementation. However, the behavior matches the
default implementation, making the override unnecessary.

This commit removes the custom implementation and disables the config
option to remove unnecessary code.

Signed-off-by: Miguel Gazquez <miguel.gazquez@bootlin.com>

Author: miggazElquez

soc/sensry/ganymed/sy1xx/Kconfig.defconfig

@@ -61,9 +61,6 @@ config USE_DT_CODE_PARTITION
 config RISCV_SOC_HAS_CUSTOM_IRQ_LOCK_OPS
 	default n
 
-config RISCV_SOC_EXCEPTION_FROM_IRQ
-	default y
-
 config INIT_STACKS
 	default y
 

soc/sensry/ganymed/sy1xx/common/crt0.S

@@ -26,12 +26,6 @@ __prestart_routine:
     /* Call into Zephyr initialization. */
     jal x0, __start
 
-GTEXT(__soc_is_irq)
-SECTION_FUNC(exception.other, __soc_is_irq)
-	csrr a0, mcause
-	srli a0, a0, 31
-	ret
-
 GTEXT(__soc_handle_irq)
 SECTION_FUNC(exception.other, __soc_handle_irq)
 	## clear pending interrupt