arm_adi_v5: report sysmem on class 0x9 ROM tables

arm_adi_v5: report sysmem on class 0x9 ROM tables

As Class 0x1 ROM table, also Class 0x9 ROM tables encodes a flag
for system memory access.

Detect the flag in rtp_cs_component() and dump the same message
for both type of ROM tables.
Extend rtp_read_cs_regs() to read ARM_CS_C9_DEVID.

Change-Id: Ic85d1ea068ed706ceedfd65076ff4c96d04e9792
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/6817
Tested-by: jenkins
Reviewed-by: Daniel Goehring <dgoehrin@os.amperecomputing.com>