target/loongarch: fix a wrong print in cpu dump

target/loongarch: fix a wrong print in cpu dump

description:
    loongarch_cpu_dump_state() want to dump all loongarch cpu
state registers, but there is a tiny typographical error when
printing "PRCFG2".

Cc: qemu-stable@nongnu.org
Signed-off-by: lanyanzhi <lanyanzhi22b@ict.ac.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20240604073831.666690-1-lanyanzhi22b@ict.ac.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
(cherry picked from commit 78f932ea1f7b3b9b0ac628dc2a91281318fe51fa)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>