riscv: Remove unnecessary irqflags processor.h include

This include is not used and can lead to circular dependencies.
Signed-off-by: Charlie Jenkins <charlie@rivosinc.com>
Reviewed-by: Samuel Holland <samuel.holland@sifive.com>
Link: https://lore.kernel.org/r/20240312-fencei-v13-1-4b6bdc2bbf32@rivosinc.comSigned-off-by: Palmer Dabbelt <palmer@rivosinc.com>

arch/riscv/include/asm/irqflags.h

@@ -7,7 +7,6 @@
 #ifndef _ASM_RISCV_IRQFLAGS_H
 #define _ASM_RISCV_IRQFLAGS_H
 
-#include <asm/processor.h>
 #include <asm/csr.h>
 
 /* read interrupt enabled status */