arch/{arm64,riscv}: Remove "CRIT: " from log messages

It is no longer necessary to explicitly add "CRIT: " in front of
BIOS_CRIT message.

Change-Id: I506c1d278960c91d1283e9b1936c9c1678a10e17
Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69497
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>

src/arch/arm64/fit_payload.c

@@ -169,7 +169,7 @@ bool fit_payload_arch(struct prog *payload, struct fit_config_node *config,
 	void *arg = NULL;
 
 	if (!decompress_kernel_header(config->kernel)) {
-		printk(BIOS_CRIT, "CRIT: Payload doesn't look like an ARM64"
+		printk(BIOS_CRIT, "Payload doesn't look like an ARM64"
 		       " kernel Image.\n");
 		return false;
 	}

src/arch/riscv/fit_payload.c

@@ -67,7 +67,7 @@ bool fit_payload_arch(struct prog *payload, struct fit_config_node *config,
 	void *arg = NULL;
 
 	if (!config->fdt || !fdt) {
-		printk(BIOS_CRIT, "CRIT: Providing a valid FDT is mandatory to "
+		printk(BIOS_CRIT, "Providing a valid FDT is mandatory to "
 		       "boot a RISC-V kernel!\n");
 		return false;
 		/* TODO: Fall back to the ROM FDT? */