misc: amd-sbi: Address potential integer overflow issue reported in smatch

Smatch warnings are reported for below commit,

Commit bb13a84ed6b7 ("misc: amd-sbi: Add support for CPUID protocol")
from Apr 28, 2025 (linux-next), leads to the following Smatch static
checker warning:

drivers/misc/amd-sbi/rmi-core.c:132 rmi_cpuid_read() warn: bitwise OR is zero '0xffffffff00000000 & 0xffff'
drivers/misc/amd-sbi/rmi-core.c:132 rmi_cpuid_read() warn: potential integer overflow from user 'msg->cpu_in_out << 32'
drivers/misc/amd-sbi/rmi-core.c:213 rmi_mca_msr_read() warn: bitwise OR is zero '0xffffffff00000000 & 0xffff'
drivers/misc/amd-sbi/rmi-core.c:213 rmi_mca_msr_read() warn: potential integer overflow from user 'msg->mcamsr_in_out << 32'

CPUID & MCAMSR thread data from input is available at byte 4 & 5, this
patch fixes to copy the user data correctly in the argument.
Previously, CPUID and MCAMSR data is return only for thread 0.

Fixes: bb13a84ed6b7 ("misc: amd-sbi: Add support for CPUID protocol")
Fixes: 69b1ba83d21c ("misc: amd-sbi: Add support for read MCA register protocol")
Reported-by: Dan Carpenter <[e-mail]>
Closes: https://lore.kernel.org/all/[e-mail]/
Reviewed-by: Naveen Krishna Chatradhi <[e-mail]>
Signed-off-by: Akshay Gupta <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/misc/amd-sbi/rmi-core.c

···
 #define RD_MCA_CMD	0x86
 
 /* CPUID MCAMSR mask & index */
-#define CPUID_MCA_THRD_MASK	GENMASK(15, 0)
 #define CPUID_MCA_THRD_INDEX	32
 #define CPUID_MCA_FUNC_MASK	GENMASK(31, 0)
 #define CPUID_EXT_FUNC_INDEX	56
···
 		goto exit_unlock;
 	}
 
-	thread = msg->cpu_in_out << CPUID_MCA_THRD_INDEX & CPUID_MCA_THRD_MASK;
+	thread = msg->cpu_in_out >> CPUID_MCA_THRD_INDEX;
 
 	/* Thread > 127, Thread128 CS register, 1'b1 needs to be set to 1 */
 	if (thread > 127) {
···
 		goto exit_unlock;
 	}
 
-	thread = msg->mcamsr_in_out << CPUID_MCA_THRD_INDEX & CPUID_MCA_THRD_MASK;
+	thread = msg->mcamsr_in_out >> CPUID_MCA_THRD_INDEX;
 
 	/* Thread > 127, Thread128 CS register, 1'b1 needs to be set to 1 */
 	if (thread > 127) {