drivers: interrupt_controller: nuclei_eclic: do not modifiy trap entry

RISC-V trap entry is handled in soc/common/riscv-privileged/vector.S.
Remove the redundant modification in CLIC driver.

Signed-off-by: Jimmy Zheng <[email protected]>

Author: jimmyzhe

drivers/interrupt_controller/intc_nuclei_eclic.c

@@ -83,9 +83,6 @@ struct CLICCTRL {
 	volatile uint8_t INTCTRL;
 };
 
-/** ECLIC Mode mask for MTVT CSR Register */
-#define ECLIC_MODE_MTVEC_Msk   3U
-
 /** CLIC INTATTR: TRIG Mask */
 #define CLIC_INTATTR_TRIG_Msk  0x3U
 
@@ -178,8 +175,6 @@ static int nuclei_eclic_init(const struct device *dev)
 		ECLIC_CTRL[i] = (struct CLICCTRL) { 0 };
 	}
 
-	csr_write(mtvec, ((csr_read(mtvec) & 0xFFFFFFC0) | ECLIC_MODE_MTVEC_Msk));
-
 	nlbits = ECLIC_CFG.b.nlbits;
 	intctlbits = ECLIC_INFO.b.intctlbits;
 	max_prio = mask8(intctlbits - nlbits);