target/cortex_m: support Infineon Cortex-M33 from SLx2 MCU

The secure microcontroller Infineon SLx2 uses a custom Cortex-M33.
The register CPUID reports value 0x490FDB00.

Reference link to the product:
Link: https://www.infineon.com/cms/en/about-infineon/press/market-news/2022/INFCSS202211-034.html

Change-Id: I8911712c55bd50e24ed53cf49958352f470027a5
Signed-off-by: Ahmed Boughanmi <boughanmi.external@infineon.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/7879
Reviewed-by: Karl Palsson <karlp@tweak.au>
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>

src/target/arm.h

@@ -61,6 +61,7 @@ enum arm_arch {
 /** Known ARM implementor IDs */
 enum arm_implementor {
 	ARM_IMPLEMENTOR_ARM = 0x41,
+	ARM_IMPLEMENTOR_INFINEON = 0x49,
 	ARM_IMPLEMENTOR_REALTEK = 0x72,
 };